1 Department of Surgical Oncology, Shri Guru Ram Rai Institute of Medical and Health Sciences and Shri Mahant Indiresh Hospital, Dehradun, Uttarakhand 248001 India.
2 Department for Endocrine Surgery, Surgical Oncology Clinic, Institute for Oncology and Radiology of Serbia, Pasterova 14, Belgrade, Serbia.
3 Medical School, University of Belgrade, Dr Subotica, Belgrade, Serbia.
4 Department of Surgical Oncology, All India Institute of Medical Sciences, Jodhpur, Rajasthan 342005 India.