[1]Institute of Endemic Diseases;
Health Science Center;
School of Public Health;
Xi''an Jiciotong University;
Key Laboratory of Trace Elements and Endemic Diseases;
National Health and Family Planning Commission;
Xi''an 710061;
China;
[2]Department of Physiology and Pathophysiology;
School of Medicine;
Xi''an Jiaotong University;
Xi''an 710061;
China;
[3]Second Department of Cardiology;
Shaanxi Province People''s Hospital;
Xi''an 710068;
China;
[4]Department of Cardiology;
Second Affiliated Hospital;
School of Medicine;
Xi''an Jiaotong University;
Xi''an 710004;
China;
[1]Institute of Endemic Diseases;
Health Science Center;
School of Public Health;
Xi''an Jiciotong University;
Key Laboratory of Trace Elements and Endemic Diseases;
National Health and Family Planning Commission;
Xi''an 710061;
China;
[1]Institute of Endemic Diseases;
Health Science Center;
School of Public Health;
Xi''an Jiciotong University;
Key Laboratory of Trace Elements and Endemic Diseases;
National Health and Family Planning Commission;
Xi''an 710061;
China;
[1]Institute of Endemic Diseases;
Health Science Center;
School of Public Health;
Xi''an Jiciotong University;
Key Laboratory of Trace Elements and Endemic Diseases;
National Health and Family Planning Commission;
Xi''an 710061;
China;
[1]Institute of Endemic Diseases;
Health Science Center;
School of Public Health;
Xi''an Jiciotong University;
Key Laboratory of Trace Elements and Endemic Diseases;
National Health and Family Planning Commission;
Xi''an 710061;
China;
[5]Department of Integrative Medical Biology;
University of Umed;
Umea 90187;
Sweden;
[6]Department of Human Anatomy and Histo-Embryology;
School of Medicine;
Xi''an Jiaotong University;
Xi''an 710061;
China;
Keshan disease; selenium supplementation; follow-up;