School of Public Health;
Weifang Medical University;
Weifang 261053;
Shandong;
China;
Public Health Testing Center;
School of Public Health and Management;
Weifang Medical University;
Weifang 261053;
Shandong;
China;
Weifang Key Laboratory of Health Inspetion and Quarantine;
Weifang 261053;
Shandong;
China;