1 Department of Psychiatry, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India.
2 Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India.
3 Department of Anaesthesia and Intensive Care Unit, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India.
4 Department of Psychiatry, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India. Electronic address: drsandeepg2002@yahoo.com.