1. Department of Dermatology and STD, Vardhman Mahavir Medical College and Safdarjung Hospital, South Delhi, India
2. Department of Dermatology & STD, Pandit Madan Mohan Malaviya Hospital, New Delhi, India
3. Department of Pathology, Indian Council of Medical Research National Institute of Pathology, Safdarjung Hospital Campus, New Delhi, India,