Delta University for Science and Technology, Gamasa, Dakahelia, Egypt
Hvidovre Hospital, Hvidovre, Denmark
Perth Children's Hospital, Perth, Western Australia, Australia
Hospital das Clinicas HCFMUSP, Sao Paulo, Brazil
Dr Sardjito General Hospital, Yogyakarta, Indonesia
Akdeniz University Faculty of Medicine, Antalya, Konyaalti, Turkey
Assiut university children hospital, Assiut, Egypt
Clínica Universitaria Colombia, Bogotá, Colombia