1. Department of Anaesthesiology, All India Institute of Medical Sciences, Mangalagiri, Andhra Pradesh, India
2. Department of Anaesthesiology, All India Institute of Medical Sciences, Raipur, Chhattisgarh, India
3. Department of Obstetrics and Gynaecology, All India Institute of Medical Sciences, Mangalagiri, Andhra Pradesh, India
4. Department of Anaesthesiology, Kalyan Singh Super Specialty Cancer Institute, Lucknow, Uttar Pradesh, India