Vishnu Khanal1, Pratik Khanal2, Andy H Lee3. 1. Nepal Development Society, Bharatpur, Nepal; School of Public Health, Curtin University, Perth, Australia. Electronic address: khanal.vishnu@gmail.com. 2. Maharajgunj Medical Campus, Institute of Medicine, Kathmandu, Nepal. 3. School of Public Health, Curtin University, Perth, Australia.