1. Department of Materia Medica, National Institute of Homoeopathy, Ministry of AYUSH, Govt. of India, Kolkata, West Bengal, India
2. Department of Organon of Medicine and Homoeopathic Philosophy, D. N. De Homoeopathic Medical College and Hospital, Kolkata, Govt. of West Bengal, West Bengal, India
3. Department of Repertory, The Calcutta Homoeopathic Medical College and Hospital, affiliated to The West Bengal University of Health Sciences, Govt. of West Bengal, Kolkata, West Bengal, India
4. Department of Health & Family Welfare, East Bishnupur State Homoeopathic Dispensary, Chandi Daulatabad Block Primary Health Centre, West Bengal, Govt. of West Bengal, India
5. Department of Repertory, D. N. De Homoeopathic Medical College and Hospital, Govt. of West Bengal; affiliated to The West Bengal University of Health Sciences, Kolkata, West Bengal, India