1. Department of Obstetrics and Gynecology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
2. Key Laboratory of Laparoscopic Technology, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
3. International Healthcare Management Research and Development Center, Shandong Provincial Qianfoshan Hospital, Jinan, China
4. Atlantica Instituto Universitario, Gestao em Saude, Oeiras, Portugal