Department of Epidemiology, Guangdong Cardiovascular Institute, Guangdong ProvincialKey Laboratory of South China StructuralHeart Disease, Guangdong GeneralHospital, Guangdong Academy of MedicalSciences, Guangzhou, Guangdong, China;
Department of Epidemiology, Guangdong Cardiovascular Institute, Guangdong ProvincialKey Laboratory of South China StructuralHeart Disease, Guangdong GeneralHospital, Guangdong Academy of MedicalSciences, Guangzhou, Guangdong, China;
Department of Epidemiology, Guangdong Cardiovascular Institute, Guangdong ProvincialKey Laboratory of South China StructuralHeart Disease, Guangdong GeneralHospital, Guangdong Academy of MedicalSciences, Guangzhou, Guangdong, China;