1. Allergy & Asthma Treatment Centre, Moulali and Diabetes and Allergy-Asthma Therapeutics Specialty Clinic, Kolkata, India
2. Department of Pharmacology, JMN Medical College, Chakdaha, West Bengal, India
3. Division of Allergy & Immunology, Department of Respiratory Medicine, Apollo Multispeciality Hospital, Kolkata and Honorary Medical Director, Allergy and Asthma Treatment Centre, Kolkata, India