1. Public Health Policy Evaluation Unit, School of Public Health, Imperial College London , Reynolds Building, St Dunstan's Road, London W6 8RP, UK
2. The George Institute for Global Health, Faulty of Medicine and Health, University of New South Wales , Level 5, 1 King Street Newtown, Sydney 2042, Australia
3. Global Health Research Centre, Duke Kunshan University , Academic Building 3038, No. 8 Duke Avenue, Kunshan, Jiangsu 215316, China
4. Public Health Research Centre and Comprehensive Health Research Centre, NOVA National School of Public Health, NOVA University Lisbon , Avenida Padre Cruz, Lisbon 1600-560, Portugal
5. China Center for Health Development Studies, Peking University Health Science Center , 38 Xueyuan Road, Haidian District, Beijing 100191, China
6. School of Public Health, Harbin Medical University , No. 157 Baojian Road, Nangang District, Harbin 150081, China