Published on in Vol 23, No 9 (2021): September
1 Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing, China
2 School of Information Management, Nanjing University, Nanjing, China
3 School of Economics and Management, Nanjing University of Science and Technology, Nanjing, China
4 Nanjing Jiangning Maternal and Child Health and Family Planning Service Center, Nanjing, China
*these authors contributed equally