1. Laboratory of Pharmacology, National Institute of Pharmaceutical Education and Research, Guwahati, Assam, India;
2. Department of Pharmacology, Pandit Jawaharlal Nehru Government Medical College Chamba, Chamba, Himachal Pradesh, India;
3. Department of Community Medicine, Pandit Jawaharlal Nehru Government Medical College Chamba, Chamba, Himachal Pradesh, India;
4. Department of Pharmacology, Gauhati Medical College and Hospital, Bhangagarh, Guwahati, Assam, India