1. Department of Pharmacology & Toxicology; National Institute of Pharmaceutical Education and Research; Guwahati 781 032 Assam India
2. Neuropharmacology Research Laboratory, Department of Pharmaceutics; Indian Institute of Technology (Banaras Hindu University); Varanasi 221 005 Uttar Pradesh India
3. Department of Pharmacology; Gauhati Medical College; Guwahati 781 032 India