1 Department of Anesthesia and Intensive Care, Jaber Al Ahmad Al Sabah Hospital, Arabian Gulf, Kuwait.

2 Department of Anaesthesia and Cardiac Anaesthesia, Atal Bihari Vajpayee Institute of Medical Sciences (ABVIMS) and Dr. Ram Manohar Lohia Hospital, Baba Kharak Singh Marg, New Delhi, India.

Dr. Suresh wrote the first draft of the article. Dr. Magoon revised the article and did the final approval of the article; both authors contributed to the literature search of the article; all authors have read and approved the final version of the article. All authors agree to be accountable for all aspects of the work.

The authors have disclosed that they do not have any potential conflicts of interest.