1. Dr. Susovan Halder’s Clinic and Kasturi Medical Centre, Thakurpukur, West Bengal, India
2. Department of Medicine, Barasat Govt. Medical College and Hospital, Barasat, West Bengal, India
3. Department of Clinical and Experimental Pharmacology, School of Tropical Medicine, Kolkata, West Bengal, India
4. NH Hospital, Mukundapur, West Bengal, Kolkata, India