1. Department of Organon of Medicine and Homoeopathic Philosophy, National Institute of Homoeopathy, Kolkata, India.
2. Director, National Institute of Homoeopathy, Kolkata, India.
3. Department of Materia Medica, and National Institute of Homoeopathy, Kolkata, India.
4. Department of Repertory, National Institute of Homoeopathy, Kolkata, India.
5. Department of Practice of Medicine, Mahesh Bhattacharyya Homoeopathic Medical College and Hospital, Government of West Bengal, Howrah, India.
6. Department of Organon of Medicine and Homoeopathic Philosophy, State National Homoeopathic Medical College and Hospital, Government of Uttar Pradesh, Lucknow, India.
7. Department of Repertory, D. N. De Homoeopathic Medical College and Hospital, Government of West Bengal, Kolkata, India.