[1] Sch Trop Med, Dept Trop Med, Kolkata 700073, W Bengal, India
[2] Calcutta Med Coll, Dept Dermatol, Kolkata, India
[3] Postgrad Inst Med Educ & Res, Dept Pharmacol, Kolkata 700020, India
[4] Sch Trop Med, Dept Dermatol, Kolkata 700073, W Bengal, India