[1] Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, Mexico
[2] Johns Hopkins Univ, Sch Med, Dept Med, Baltimore, MD 21205 USA
[3] Johns Hopkins Univ, Sch Med, Dept Dermatol, Baltimore, MD 21205 USA
[4] Johns Hopkins Univ, Sch Med, Dept Cell Biol & Anat, Baltimore, MD 21205 USA