1. Health Management and Policy Institute School of Public Policy and Administration, Xi'an Jiaotong University Xi'an China
2. Institut de Santé Publique, d'Epidémiologie et de Développement (ISPED) Université de Bordeaux Bordeaux France
3. Université de Bordeaux, INSERM, Bordeaux Population Health Research Center, team IETO, UMR1219 Bordeaux France
4. CHU Bordeaux Department of Ophthalmology, F‐33000 Bordeaux France
5. Univ. Bordeaux, INSERM, Bordeaux Population Health Research Center, team LEHA, UMR1219 Bordeaux France
6. Univ Lyon, Univ Gustave Eiffel, IFSTTAR, UMRESTTE UMR_T9405, F‐69675 Lyon France