1. Department of Laboratory, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan City, Shandong Province, China
2. Department of Electrocardiography Room, Qingdao Women’s and Children’s Hospital, Qingdao City, Shandong Province, China
3. Department of Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital Prenatal Diagnosis Center, Jinan City, Shandong Province, China