From the Department of Anaesthesiology, Lady Hardinge Medical College & Associated Hospitals, New Delhi, India.
Accepted for publication January 22, 2018.
The author declares no conflicts of interest.
Reprints will not be available from the author.
Address correspondence to Nishant Kumar, DA, DNB, Department of Anaesthesiology, Lady Hardinge Medical College, Associated SSK and KSC Hospitals, New Delhi 110001, India. Address e-mail to email@example.com.