1. Key Laboratory of Birth Regulation and Control Technology of National Health and Family Planning Commission of China Maternal and Child Health Care Hospital of Shandong Province, Shandong Provincial Family Planning Institute of Science and Technology Jinan China
2. Key Laboratory of Birth Regulation and Control Technology of National Health and Family Planning Commission of China, Shandong Provincial Institute of Control of Endemic Disease Jinan China
3. Key Laboratory of Birth Regulation and Control Technology of National Health and Family Planning Commission of China Shandong Provincial Hospital Affiliated to Shandong University Jinan China