[1] Xiamen Univ, Hosp 1, Dept Rheumatol & Clin Immunol, Xiamen 361003, Peoples R China
[2] Univ Nebraska Med Ctr, Vet Affairs Nebraska Western Iowa Hlth Care Syst, Omaha, NE USA
[3] Univ Texas Southwestern Med Ctr Dallas, Dept Immunol, 5323 Harry Hines Blvd, Dallas, TX 75390 USA