Sharon Chung, MD

Education
2021 - Diversity, Equity, and Inclusion Champion Training, University of California
M.A.S., 2008 - Graduate Division (Advance Training in Clinical Research), University of California
Cert, 2006 - Graduate Division (Advance Training in Clinical Research), University of California
M.D., 2001 - School of Medicine, Johns Hopkins University
Honors and Awards
  • Ira M. Goldstein Award for Outstanding Teaching in Rheumatology, University of California, San Francisco, 2020
  • Ephraim Engleman Award for Excellence in Arthritis Research, University of California, San Francisco, 2011
  • Distinguished Fellow Award, American College of Rheumatology, 2007
Websites
Publications
  1. . . PMID:


  2. Lanata CM, Taylor KE, Hurst-Hopf J, Nititham J, Blazer A, Trupin L, Katz P, Dall'Era M, Yazdany J, Chung SA, Abrahamsson D, Gerona R, Criswell LA. Screening of environmental chemicals to characterize exposures in participants with Systemic Lupus Erythematosus. Arthritis & rheumatology (Hoboken, N.J.) 2023. PMID: 38129991


  3. Solomon O, Lanata CM, Adams C, Nititham J, Taylor KE, Chung SA, Yazdany J, Dall'Era M, Pons-Estel BA, Tusie-Luna T, Tsao B, Morand E, Alarcón-Riquelme ME, Barcellos LF, Criswell LA. Local ancestry at the MHC region is not a major contributor to disease heterogeneity in a multi-ethnic lupus cohort. Arthritis & rheumatology (Hoboken, N.J.) 2023. PMID: 38073021


  4. Lanata CM, Nititham J, Taylor KE, Solomon O, Chung SA, Blazer A, Trupin L, Katz P, Dall'Era M, Yazdany J, Sirota M, Barcellos LF, Criswell LA. The dynamics of methylation of CpG sites associated with SLE subtypes in a longitudinal cohort. A pilot telephone-based intervention for patients with poorly-controlled diabetes mellitus. 2022. PMID: 35635730


  5. Goglin S, Chung SA. New developments in treatments for systemic vasculitis. Current opinion in pharmacology 2022. PMID: 35921775


  6. Caton MT, Mark IT, Narsinh KH, Baker A, Cooke DL, Hetts SW, Dowd CF, Halbach VV, Higashida RT, Ko NU, Chung SA, Amans MR. Endovascular Therapy for Intracranial Giant Cell Arteritis : Systematic Review, Technical Considerations and the Effect of Intra-arterial Calcium Channel Blockers. TO REMOVE 2022. PMID: 35503467


  7. Gorelik M, Chung SA, Ardalan K, Binstadt BA, Friedman K, Hayward K, Imundo LF, Lapidus SK, Kim S, Son MB, Sule S, Tremoulet AH, Van Mater H, Yildirim-Toruner C, Langford CA, Maz M, Abril A, Guyatt G, Archer AM, Conn DL, Full KA, Grayson PC, Ibarra MF, Merkel PA, Rhee RL, Seo P, Stone JH, Sundel RP, Vitobaldi OI, Warner A, Byram K, Dua AB, Husainat N, James KE, Kalot M, Lin YC, Springer JM, Turgunbaev M, Villa-Forte A, Turner AS, Mustafa RA. 2021 American College of Rheumatology/Vasculitis Foundation Guideline for the Management of Kawasaki Disease. TO REMOVE 2022. PMID: 35257507


  8. Gorelik M, Chung SA, Ardalan K, Binstadt BA, Friedman K, Hayward K, Imundo LF, Lapidus SK, Kim S, Son MB, Sule S, Tremoulet AH, Van Mater H, Yildirim-Toruner C, Langford CA, Maz M, Abril A, Guyatt G, Archer AM, Conn DL, Full KA, Grayson PC, Ibarra MF, Merkel PA, Rhee RL, Seo P, Stone JH, Sundel RP, Vitobaldi OI, Warner A, Byram K, Dua AB, Husainat N, James KE, Kalot M, Lin YC, Springer JM, Turgunbaev M, Villa-Forte A, Turner AS, Mustafa RA. 2021 American College of Rheumatology/Vasculitis Foundation Guideline for the Management of Kawasaki Disease. TO REMOVE 2022. PMID: 35257501


  9. Huffaker MF, Sanda S, Chandran S, Chung SA, St Clair EW, Nepom GT, Smilek DE. Approaches to Establishing Tolerance in Immune Mediated Diseases. A pilot telephone-based intervention for patients with poorly-controlled diabetes mellitus. 2021. PMID: 34616405


  10. James KE, Kalot MA, Husainat NM, Dua AB, Byram K, Springer JM, Lin YC, Turgunbaev M, Villa-Forte A, Gorelik M, Abril A, Langford C, Maz M, Chung SA, Mustafa RA. Kawasaki Disease: A Systematic Review and Meta-Analysis of Benefits and Harms of Common Treatments. ACR Open Rheumatology 2021. PMID: 34313406


  11. Chung SA, Langford CA, Maz M, Abril A, Gorelik M, Guyatt G, Archer AM, Conn DL, Full KA, Grayson PC, Ibarra MF, Imundo LF, Kim S, Merkel PA, Rhee RL, Seo P, Stone JH, Sule S, Sundel RP, Vitobaldi OI, Warner A, Byram K, Dua AB, Husainat N, James KE, Kalot MA, Lin YC, Springer JM, Turgunbaev M, Villa-Forte A, Turner AS, Mustafa RA. 2021 American College of Rheumatology/Vasculitis Foundation Guideline for the Management of Antineutrophil Cytoplasmic Antibody-Associated Vasculitis. Arthritis care & research 2021. PMID: 34235880


  12. Chung SA, Langford CA, Maz M, Abril A, Gorelik M, Guyatt G, Archer AM, Conn DL, Full KA, Grayson PC, Ibarra MF, Imundo LF, Kim S, Merkel PA, Rhee RL, Seo P, Stone JH, Sule S, Sundel RP, Vitobaldi OI, Warner A, Byram K, Dua AB, Husainat N, James KE, Kalot MA, Lin YC, Springer JM, Turgunbaev M, Villa-Forte A, Turner AS, Mustafa RA. 2021 American College of Rheumatology/Vasculitis Foundation Guideline for the Management of Antineutrophil Cytoplasmic Antibody-Associated Vasculitis. Arthritis & rheumatology (Hoboken, N.J.) 2021. PMID: 34235894


  13. Maz M, Chung SA, Abril A, Langford CA, Gorelik M, Guyatt G, Archer AM, Conn DL, Full KA, Grayson PC, Ibarra MF, Imundo LF, Kim S, Merkel PA, Rhee RL, Seo P, Stone JH, Sule S, Sundel RP, Vitobaldi OI, Warner A, Byram K, Dua AB, Husainat N, James KE, Kalot MA, Lin YC, Springer JM, Turgunbaev M, Villa-Forte A, Turner AS, Mustafa RA. 2021 American College of Rheumatology/Vasculitis Foundation Guideline for the Management of Giant Cell Arteritis and Takayasu Arteritis. Arthritis care & research 2021. PMID: 34235871


  14. Maz M, Chung SA, Abril A, Langford CA, Gorelik M, Guyatt G, Archer AM, Conn DL, Full KA, Grayson PC, Ibarra MF, Imundo LF, Kim S, Merkel PA, Rhee RL, Seo P, Stone JH, Sule S, Sundel RP, Vitobaldi OI, Warner A, Byram K, Dua AB, Husainat N, James KE, Kalot MA, Lin YC, Springer JM, Turgunbaev M, Villa-Forte A, Turner AS, Mustafa RA. 2021 American College of Rheumatology/Vasculitis Foundation Guideline for the Management of Giant Cell Arteritis and Takayasu Arteritis. Arthritis & rheumatology (Hoboken, N.J.) 2021. PMID: 34235884


  15. Chung SA, Gorelik M, Langford CA, Maz M, Abril A, Guyatt G, Archer AM, Conn DL, Full KA, Grayson PC, Ibarra MF, Imundo LF, Kim S, Merkel PA, Rhee RL, Seo P, Stone JH, Sule S, Sundel RP, Vitobaldi OI, Warner A, Byram K, Dua AB, Husainat N, James KE, Kalot M, Lin YC, Springer JM, Turgunbaev M, Villa-Forte A, Turner AS, Mustafa RA. 2021 American College of Rheumatology/Vasculitis Foundation Guideline for the Management of Polyarteritis Nodosa. Arthritis care & research 2021. PMID: 34235889


  16. Chung SA, Gorelik M, Langford CA, Maz M, Abril A, Guyatt G, Archer AM, Conn DL, Full KA, Grayson PC, Ibarra MF, Imundo LF, Kim S, Merkel PA, Rhee RL, Seo P, Stone JH, Sule S, Sundel RP, Vitobaldi OI, Warner A, Byram K, Dua AB, Husainat N, James KE, Kalot M, Lin YC, Springer JM, Turgunbaev M, Villa-Forte A, Turner AS, Mustafa RA. 2021 American College of Rheumatology/Vasculitis Foundation Guideline for the Management of Polyarteritis Nodosa. Arthritis & rheumatology (Hoboken, N.J.) 2021. PMID: 34235883


  17. Doubelt I, Cuthbertson D, Carette S, Chung SA, Forbess LJ, Khalidi NA, Koening CL, Langford C, McAlear CA, Moreland LW, Monach PA, Seo P, Specks U, Spiera RF, Springer JM, Sreih AG, Warrington KJ, Merkel PA, Pagnoux C, Vasculitis Clinical Research Consortium. Clinical Manifestations and Long-Term Outcomes of Eosinophilic Granulomatosis With Polyangiitis in North America. ACR Open Rheumatology 2021. PMID: 34032390


  18. Dua AB, Husainat NM, Kalot MA, Byram K, Springer JM, James KE, Chang Lin Y, Turgunbaev M, Villa-Forte A, Abril A, Langford C, Maz M, Chung SA, Mustafa RA. Giant Cell Arteritis: A Systematic Review and Meta-Analysis of Test Accuracy and Benefits and Harms of Common Treatments. ACR Open Rheumatology 2021. PMID: 33811481


  19. Springer JM, Kalot MA, Husainat NM, Byram KW, Dua AB, James KE, Chang Lin Y, Turgunbaev M, Villa-Forte A, Abril A, Langford C, Maz M, Chung SA, Mustafa RA. Granulomatosis With Polyangiitis and Microscopic Polyangiitis: A Systematic Review and Meta-Analysis of Benefits and Harms of Common Treatments. ACR Open Rheumatology 2021. PMID: 33590973


  20. Schnappauf O, Sampaio Moura N, Aksentijevich I, Stoffels M, Ombrello AK, Hoffmann P, Barron K, Remmers EF, Hershfield M, Kelly SJ, , Cuthbertson D, Carette S, Chung SA, Forbess L, Khalidi NA, Koening CL, Langford CA, McAlear CA, Monach PA, Moreland L, Pagnoux C, Seo P, Springer JM, Sreih AG, Warrington KJ, Ytterberg SR, Kastner DL, Grayson PC, Merkel PA,. Sequence-Based Screening of Patients With Idiopathic Polyarteritis Nodosa, Granulomatosis With Polyangiitis, and Microscopic Polyangiitis for Deleterious Genetic Variants in ADA2. Arthritis & rheumatology (Hoboken, N.J.) 2020. PMID: 33021335


  21. Springer JM, Kalot MA, Husainat NM, Byram KW, Dua AB, James KE, Chang Lin Y, Turgunbaev M, Villa-Forte A, Abril A, Langford CA, Maz M, Chung SA, Mustafa RA. Eosinophilic Granulomatosis with Polyangiitis: A Systematic Review and Meta-Analysis of Test Accuracy and Benefits and Harms of Common Treatments. ACR Open Rheumatology 2021. PMID: 33512787


  22. Lin YC, Kalot MA, Husainat NM, Byram K, Dua AB, James KE, Springer JM, Turgunbaev M, Villa-Forte A, Abril A, Langford C, Maz M, Chung SA, Mustafa RA. Polyarteritis Nodosa: A Systematic Review of Test Accuracy and Benefits and Harms of Common Treatments. ACR Open Rheumatology 2021. PMID: 33512781


  23. Dua AB, Kalot MA, Husainat NM, Byram K, Springer JM, James KE, Chang Lin Y, Turgunbaev M, Villa-Forte A, Abril A, Langford C, Maz M, Chung SA, Mustafa RA. Takayasu Arteritis: a Systematic Review and Meta-Analysis of Test Accuracy and Benefits and Harms of Common Treatments. ACR Open Rheumatology 2021. PMID: 33512784


  24. Lanata CM, Paranjpe I, Nititham J, Taylor KE, Gianfrancesco M, Paranjpe M, Andrews S, Chung SA, Rhead B, Barcellos LF, Trupin L, Katz P, Dall'Era M, Yazdany J, Sirota M, Criswell LA. Author Correction: A phenotypic and genomics approach in a multi-ethnic cohort to subtype systemic lupus erythematosus. Nature communications 2020. PMID: 32109229


  25. Lanata CM, Paranjpe I, Nititham J, Taylor KE, Gianfrancesco M, Paranjpe M, Andrews S, Chung SA, Rhead B, Barcellos LF, Trupin L, Katz P, Dall'Era M, Yazdany J, Sirota M, Criswell LA. A phenotypic and genomics approach in a multi-ethnic cohort to subtype systemic lupus erythematosus. Nature communications 2019. PMID: 31467281


  26. Minter DJ, Geha RM, Boslett BA, Chung SA, Ramani B, Manesh R. The Right Frame. Journal of hospital medicine 2019. PMID: 30933677


  27. Lanata CM, Chung SA, Criswell LA. DNA methylation 101: what is important to know about DNA methylation and its role in SLE risk and disease heterogeneity. Lupus science & medicine 2018. PMID: 30094041


  28. Lanata CM, Nititham J, Taylor KE, Chung SA, Torgerson DG, Seldin MF, Pons-Estel BA, Tusié-Luna T, Tsao BP, Morand EF, Alarcón-Riquelme ME, Criswell LA. Genetic contributions to lupus nephritis in a multi-ethnic cohort of systemic lupus erythematous patients. PloS one 2018. PMID: 29953444


  29. Tsui JL, Estrada OA, Deng Z, Wang KM, Law CS, Elicker BM, Jones KD, Dell SD, Gudmundsson G, Hansdottir S, Helfgott SM, Volpi S, Gattorno M, Waterfield MR, Chan AY, Chung SA, Ley B, Shum AK. Analysis of pulmonary features and treatment approaches in the COPA syndrome. ERJ open research 2018. PMID: 29977900


  30. Mandal J, Chung SA. Primary Angiitis of the Central Nervous System. Volume 43 of Issue 4. Rheumatic diseases clinics of North America 2017. PMID: 29061238


  31. Mok A, Solomon O, Nayak RR, Coit P, Quach HL, Nititham J, Sawalha AH, Barcellos LF, Criswell LA, Chung SA. Genome-wide profiling identifies associations between lupus nephritis and differential methylation of genes regulating tissue hypoxia and type 1 interferon responses. Volume 3 of Issue 1. Lupus science & medicine 2016. PMID: 28074145


  32. Chung SA, Shum AK. Rare variants, autoimmune disease, and arthritis. Volume 28 of Issue 4. Current opinion in rheumatology 2016. PMID: 27224741


  33. Chung SA, Nititham J, Elboudwarej E, Quach HL, Taylor KE, Barcellos LF, Criswell LA. Genome-Wide Assessment of Differential DNA Methylation Associated with Autoantibody Production in Systemic Lupus Erythematosus. PloS one 2015. PMID: 26192630


  34. Chung SA, Brown EE, Williams AH, Ramos PS, Berthier CC, Bhangale T, Alarcon-Riquelme ME, Behrens TW, Criswell LA, Graham DC, Demirci FY, Edberg JC, Gaffney PM, Harley JB, Jacob CO, Kamboh MI, Kelly JA, Manzi S, Moser-Sivils KL, Russell LP, Petri M, Tsao BP, Vyse TJ, Zidovetzki R, Kretzler M, Kimberly RP, Freedman BI, Graham RR, Langefeld CD. Lupus nephritis susceptibility loci in women with systemic lupus erythematosus. Journal of the American Society of Nephrology : JASN 2014. PMID: 24925725


  35. Morris DL, Fernando MM, Taylor KE, Chung SA, Nititham J, Alarcón-Riquelme ME, Barcellos LF, Behrens TW, Cotsapas C, Gaffney PM, Graham RR, Pons-Estel BA, Gregersen PK, Harley JB, Hauser SL, Hom G, Langefeld CD, Noble JA, Rioux JD, Seldin MF, Vyse TJ, Criswell LA. MHC associations with clinical and autoantibody manifestations in European SLE. Genes and immunity 2014. PMID: 24598797


  36. Namjou B, Kim-Howard X, Sun C, Adler A, Chung SA, Kaufman KM, Kelly JA, Glenn SB, Guthridge JM, Scofield RH, Kimberly RP, Brown EE, Alarcón GS, Edberg JC, Kim JH, Choi J, Ramsey-Goldman R, Petri MA, Reveille JD, Vilá LM, Boackle SA, Freedman BI, Tsao BP, Langefeld CD, Vyse TJ, Jacob CO, Pons-Estel B, Niewold TB, Moser Sivils KL, Merrill JT, Anaya JM, Gilkeson GS, Gaffney PM, Bae SC, Alarcón-Riquelme ME, Harley JB, Criswell LA, James JA, Nath SK. PTPN22 association in systemic lupus erythematosus (SLE) with respect to individual ancestry and clinical sub-phenotypes. PloS one 2013. PMID: 23950893


  37. Manjarrez-Orduño N, Marasco E, Chung SA, Katz MS, Kiridly JF, Simpfendorfer KR, Freudenberg J, Ballard DH, Nashi E, Hopkins TJ, Cunninghame Graham DS, Lee AT, Coenen MJ, Franke B, Swinkels DW, Graham RR, Kimberly RP, Gaffney PM, Vyse TJ, Behrens TW, Criswell LA, Diamond B, Gregersen PK. CSK regulatory polymorphism is associated with systemic lupus erythematosus and influences B-cell signaling and activation. Nature genetics 2012. PMID: 23042117


  38. Richman IB, Taylor KE, Chung SA, Trupin L, Petri M, Yelin E, Graham RR, Lee A, Behrens TW, Gregersen PK, Seldin MF, Criswell LA. European genetic ancestry is associated with a decreased risk of lupus nephritis. Arthritis and rheumatism 2012. PMID: 23023776


  39. Chung SA, Xie G, Roshandel D, Sherva R, Edberg JC, Kravitz M, Dellaripa PF, Hoffman GS, Mahr AD, Seo P, Specks U, Spiera RF, St Clair EW, Stone JH, Plenge RM, Siminovitch KA, Merkel PA, Monach PA. Meta-analysis of genetic polymorphisms in granulomatosis with polyangiitis (Wegener's) reveals shared susceptibility loci with rheumatoid arthritis. Arthritis and rheumatism 2012. PMID: 22508400


  40. Ramos PS, Criswell LA, Moser KL, Comeau ME, Williams AH, Pajewski NM, Chung SA, Graham RR, Zidovetzki R, Kelly JA, Kaufman KM, Jacob CO, Vyse TJ, Tsao BP, Kimberly RP, Gaffney PM, Alarcón-Riquelme ME, Harley JB, Langefeld CD. A comprehensive analysis of shared loci between systemic lupus erythematosus (SLE) and sixteen autoimmune diseases reveals limited genetic overlap. PLoS genetics 2011. PMID: 22174698


  41. Chung SA, Taylor KE, Graham RR, Nititham J, Lee AT, Ortmann WA, Jacob CO, Alarcón-Riquelme ME, Tsao BP, Harley JB, Gaffney PM, Moser KL, Petri M, Demirci FY, Kamboh MI, Manzi S, Gregersen PK, Langefeld CD, Behrens TW, Criswell LA. Differential genetic associations for systemic lupus erythematosus based on anti-dsDNA autoantibody production. PLoS genetics 2011. PMID: 21408207


  42. Taylor KE, Chung SA, Graham RR, Ortmann WA, Lee AT, Langefeld CD, Jacob CO, Kamboh MI, Alarcón-Riquelme ME, Tsao BP, Moser KL, Gaffney PM, Harley JB, Petri M, Manzi S, Gregersen PK, Behrens TW, Criswell LA. Risk alleles for systemic lupus erythematosus in a large case-control collection and associations with clinical subphenotypes. PLoS genetics 2011. PMID: 21379322


  43. Chung SA, Seo P. Microscopic polyangiitis. Rheumatic diseases clinics of North America 2010. PMID: 20688249


  44. Barcellos LF, May SL, Ramsay PP, Quach HL, Lane JA, Nititham J, Noble JA, Taylor KE, Quach DL, Chung SA, Kelly JA, Moser KL, Behrens TW, Seldin MF, Thomson G, Harley JB, Gaffney PM, Criswell LA. High-density SNP screening of the major histocompatibility complex in systemic lupus erythematosus demonstrates strong evidence for independent susceptibility regions. PLoS genetics 2009. PMID: 19851445


  45. Richman IB, Chung SA, Taylor KE, Kosoy R, Tian C, Ortmann WA, Nititham J, Lee AT, Rutman S, Petri M, Manzi S, Behrens TW, Gregersen PK, Seldin MF, Criswell LA. European population substructure correlates with systemic lupus erythematosus endophenotypes in North Americans of European descent. Genes and immunity 2009. PMID: 19847193


  46. Gateva V, Sandling JK, Hom G, Taylor KE, Chung SA, Sun X, Ortmann W, Kosoy R, Ferreira RC, Nordmark G, Gunnarsson I, Svenungsson E, Padyukov L, Sturfelt G, Jönsen A, Bengtsson AA, Rantapää-Dahlqvist S, Baechler EC, Brown EE, Alarcón GS, Edberg JC, Ramsey-Goldman R, McGwin G, Reveille JD, Vilá LM, Kimberly RP, Manzi S, Petri MA, Lee A, Gregersen PK, Seldin MF, Rönnblom L, Criswell LA, Syvänen AC, Behrens TW, Graham RR. A large-scale replication study identifies TNIP1, PRDM1, JAZF1, UHRF1BP1 and IL10 as risk loci for systemic lupus erythematosus. Nature genetics 2009. PMID: 19838195


  47. Chung SA, Tian C, Taylor KE, Lee AT, Ortmann WA, Hom G, Graham RR, Nititham J, Kelly JA, Morrisey J, Wu H, Yin H, Alarcón-Riquelme ME, Tsao BP, Harley JB, Gaffney PM, Moser KL, Manzi S, Petri M, Gregersen PK, Langefeld CD, Behrens TW, Seldin MF, Criswell LA. European population substructure is associated with mucocutaneous manifestations and autoantibody production in systemic lupus erythematosus. Arthritis and rheumatism 2009. PMID: 19644962


  48. Liu K, Li QZ, Delgado-Vega AM, Abelson AK, Sánchez E, Kelly JA, Li L, Liu Y, Zhou J, Yan M, Ye Q, Liu S, Xie C, Zhou XJ, Chung SA, Pons-Estel B, Witte T, de Ramón E, Bae SC, Barizzone N, Sebastiani GD, Merrill JT, Gregersen PK, Gilkeson GG, Kimberly RP, Vyse TJ, Kim I, D'Alfonso S, Martin J, Harley JB, Criswell LA, Wakeland EK, Alarcón-Riquelme ME, Mohan C. Kallikrein genes are associated with lupus and glomerular basement membrane-specific antibody-induced nephritis in mice and humans. The Journal of clinical investigation 2009. PMID: 19307730


  49. Chung SA, Seo P. Advances in the use of biologic agents for the treatment of systemic vasculitis. Current opinion in rheumatology 2009. PMID: 19077713


  50. Taylor KE, Remmers EF, Lee AT, Ortmann WA, Plenge RM, Tian C, Chung SA, Nititham J, Hom G, Kao AH, Demirci FY, Kamboh MI, Petri M, Manzi S, Kastner DL, Seldin MF, Gregersen PK, Behrens TW, Criswell LA. Specificity of the STAT4 genetic association for severe disease manifestations of systemic lupus erythematosus. PLoS genetics 2008. PMID: 18516230


  51. Hom G, Graham RR, Modrek B, Taylor KE, Ortmann W, Garnier S, Lee AT, Chung SA, Ferreira RC, Pant PV, Ballinger DG, Kosoy R, Demirci FY, Kamboh MI, Kao AH, Tian C, Gunnarsson I, Bengtsson AA, Rantapää-Dahlqvist S, Petri M, Manzi S, Seldin MF, Rönnblom L, Syvänen AC, Criswell LA, Gregersen PK, Behrens TW. Association of systemic lupus erythematosus with C8orf13-BLK and ITGAM-ITGAX. The New England journal of medicine 2008. PMID: 18204098


  52. Chung SA, Criswell LA. PTPN22: its role in SLE and autoimmunity. Autoimmunity 2007. PMID: 18075792