1 Department of Community Medicine, Mahatma Gandhi Medical College & Research Institute, Puducherry, 607403, India. Electronic address: amritm@mgmcri.ac.in.
2 Department of Community Medicine, Mahatma Gandhi Medical College & Research Institute, Puducherry, 607403, India. Electronic address: abhijitvboratne@mgmcri.ac.in.
3 Department of Community & Family Medicine, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, 249202, India. Electronic address: yogesh.cfm@aiimsrishikesh.edu.in.