1 Department of Radiotherapy and Oncology, Indira Gandhi Medical College (IGMC), Room No 46, Tertiary Cancer Centre, Shimla, Himachal Pradesh 171001, India.
2 Department of Radiotherapy and Oncology, Indira Gandhi Medical College (IGMC), Room No 46, Tertiary Cancer Centre, Shimla, Himachal Pradesh 171001, India. email: drrajeevsandal@yahoo.com.