Government of the People's Republic of China - China-Japan Friendship Hospital, China Development Research Foundation (CDRF), Capital Medical University - Beijing Chaoyang Hospital, Imperial College London - Department of Primary Care and Public Health, China Development Research Foundation (CDRF), Government of the People's Republic of China - China-Japan Friendship Hospital, Dajie Town Health Centre, Dajie Town Health Centre, Government of the People's Republic of China - China-Japan Friendship Hospital, Government of the People's Republic of China - China-Japan Friendship Hospital, Government of the People's Republic of China - China-Japan Friendship Hospital, Government of the People's Republic of China - China-Japan Friendship Hospital, Government of the People's Republic of China - China-Japan Friendship Hospital, Government of the People's Republic of China - China-Japan Friendship Hospital, Government of the People's Republic of China - China-Japan Friendship Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Government of the People's Republic of China - China-Japan Friendship Hospital, Government of the People's Republic of China - China-Japan Friendship Hospital, Government of the People's Republic of China - China-Japan Friendship Hospital, Imperial College London - Department of Primary Care and Public Health, Government of the People's Republic of China - Department of Dermatology, Tsinghua University, China Development Research Foundation (CDRF) and Government of the People's Republic of China - China-Japan Friendship Hospital