1. Department of Community Medicine, Government Medical College , Thiruvanananthapuram, Kerala, India
2. ICMR – Vector Control Research Centre (field station) , Kottayam, Kerala, India
3. Achutha Menon Centre for Health Science Studies, Sree Chitra Tirunal Institute for Medical Sciences and Technology , Thiruvananthapuram, Kerala, India
4. Department of Health Services, Government of Kerala , India
5. Department of Community Medicine, Government Medical College , Kollam, Kerala, India