1. Department of Community Medicine, Shri Guru Ram Rai Institute of Medical and Health Sciences, Dehradun, Uttarakhand, India
2. Department of Paediatrics, Shri Guru Ram Rai Institute of Medical and Health Sciences, Dehradun, Uttarakhand, India
3. Department of Community Medicine, Government Doon Medical College, Dehradun, Uttarakhand, India