[1] Sehgal Nursing Home, Dermatovenereol Skin VD Ctr, Delhi, India
[2] Lady Hardinge Med Coll & Hosp, Dept Dermatol & Venereol, New Delhi, India
[3] All India Inst Med Sci, Dept Dermatol & Venereol, New Delhi, India
[4] Univ Delhi, Vallabhbhai Patel Chest Inst, Dept Pathol, New Delhi, India
[5] Skin Inst, Dept Skin & VD, New Delhi, India