Tan W, Sunahori K, Zhao J, Deng Y, Kaufman KM, Kelly JA, Langefeld CD, Williams AH, Comeau ME, Ziegler JT, Marion MC, Bae SC, Lee JH, Lee JS, Chang DM, Song YW, Yu CY, Kimberly RP, Edberg JC, Brown EE, Petri MA, Ramsey-Goldman R, Vil? LM, Reveille JD, Alarc?n-Riquelme ME, Harley JB, Boackle SA, Stevens AM, Scofield RH, Merrill JT, Freedman BI, Anaya JM, Criswell LA, Jacob CO, Vyse TJ, Niewold TB, Gaffney PM, Moser KL, Gilkeson GS, Kamen DL, James JA, Grossman JM, Hahn BH, Tsokos GC, Tsao BP, Alarc?n GS. Association of PPP2CA polymorphisms with systemic lupus erythematosus susceptibility in multiple ethnic groups. Arthritis Rheum. 2011 Sep; 63(9):2755-63.