1. Department of Pediatrics, The Sixth Affiliated Hospital of Guangxi Medical University: The First People’s Hospital of Yulin, Yulin, Guangxi, P.R. China
2. Department of Pediatrics, Red Cross Hospital of Yulin city, Yulin, Guangxi, P.R. China
3. Private practitioner, Pediatric, Bujumbura, Burundi
4. Department of Pediatrics, The Second Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, P.R. China