1 Department of Neuromedicine, Bangur Institute of Neurosciences, Institute of Post Graduate Medical Education and Research & SSKM Hospital, Kolkata, West Bengal, India.
2 Department of Psychiatry, Behrampore Mental Hospital, Berhampore, Mushridabad, West Bengal, India.
3 Department of General Medicine, Burdwan Medical College and Hospital, Burdwan, West Bengal, India.
4 Department of General Medicine, Rajendra Institute of Medical Sciences, Ranchi, Jharkhand, India.