1. Department of Homoeopathic Materia Medica, National Institute of Homoeopathy, Kolkata, West Bengal, India
2. Department of Homoeopathic Pharmacy, National Institute of Homoeopathy, Kolkata, West Bengal, India
3. Maynaguri Rural Hospital, Jalpaiguri, West Bengal, under Department of Health & Family Welfare, Govt. of West Bengal, India
4. Department of Organon of Medicine & Homoeopathic Philosophy, National Institute of Homoeopathy, Kolkata, West Bengal, India