[1] Kunming Childrens Hosp, Dept Cardiothorac Surg, Kunming, Peoples R China
[2] Kunming Childres Hosp, Dept Neonatol, Kunmimg, Peoples R China
[3] Lincang Maternal & Child Hlth Hosp, Dept Comprehens Surg, Lincang, Peoples R China
[4] Shandong First Med Univ, Affiliated Hosp 1, Int Healthcare Management Res & Dev Ctr IHM RDC, Jinan, Shandong, Peoples R China
[5] Shandong Prov Qianfoshan Hosp, Jinan, Shandong, Peoples R China
[6] Atlantica Inst Univ, Hlth Management, Oeiras, Portugal