1 Department of Community Medicine, VMMC & Safdarjung Hospital, New Delhi 110029, India.
2 Department of Pulmonary and Critical Care Medicine, Nodal Officer of DOTS, VMMC & Safdarjung Hospital, New Delhi 110029, India.
3 Department of Pulmonary and Critical Care Medicine, Nodal Officer of COVID-19, VMMC & Safdarjung Hospital, New Delhi 110029, India.
4 Department of Pulmonary and Critical Care Medicine, VMMC & Safdarjung Hospital, New Delhi 110029, India. Electronic address: pranavish2512@gmail.com.