1. a School of Environmental Studies, Jadavpur University , Kolkata, India
2. b Department of Neurology , Medical College , Kolkata, India
3. c Institute of Statistical Research and Training, University of Dhaka , Dhaka, Bangladesh
4. d Department of Dermatology , Institute of Post Graduate Medical Education and Research, SSKM Hospital , Kolkata, India
5. e Department of Pathology , University College of Medicine , Kolkata, India