1. Department of Epidemiology and Biostatistics, School of Public HealthXi'an Jiaotong University Health Science Center Xi'an China
2. Global Health InstituteXi'an Jiaotong University Xi'an China
3. Institute of MedicineTribhuvan University Kathmandu Nepal
4. College of Health and BiomedicineVictoria University Melbourne Australia
5. Nepal Public Health Foundation (NPHF) Maharajgunj, Kathmandu Nepal
6. Department of Biostatistics and Epidemiology, College of Public HealthEast Tennessee State University Johnson City Tennessee