School of Public Health Kunming Medical University Kunming 650500 Yunnan Province ChinaXi''an Xincheng District Center for Disease Control and Prevention Xi''an 710000 Shaanxi Province China;
The Second Affiliated Hospital of Xi''an Medical College Xi''an 710038 Shaanxi Province China;
Traditional Chinese Medicine Hospital of Xincheng District Xi''an 710000 Shaanxi Province China;
Xi''an Xincheng District Center for Disease Control and Prevention Xi''an 710000 Shaanxi Province China;
School of Public Health Kunming Medical University Kunming 650500 Yunnan Province China;
School of Public Health Kunming Medical University Kunming 650500 Yunnan Province China;
School of Public Health Kunming Medical University Kunming 650500 Yunnan Province China;