1 Department of Emergency & Critical Care Medicine, Sri Gokulam Hospitals & Research Institute, Salem, TamilNadu, India. Electronic address: maniansenthil@yahoo.co.in.
2 Department of Emergency Medicine, Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Mumbai, India.
3 Department of Anaesthesiology, Chennai Medical College and Research Center, Irungalur, Trichy, India.
4 Department of Internal medicine, Chennai Medical College and Research Center, Irungalur, Trichy, India.