O P, Akhisha
O'Hare, Thomas Joseph, Royal College of Surgeons Ireland, 123 St. Stephens Green, Dublin 2. Ireland
O'Neill, Michaela, Loyola University Chicago, Maywood, IL, USA
O'Toole, Stuart, Department of Paediatric Surgery Royal Hospital for Sick Children Dalnair street Glasgow G3 8SJ
O. Ababneh, Muawieh
O. Abdulnnour, Alkhansa
O. Alazmi, Saad
O. Aravind, O. Aravind
O. E, Ramírez Llerena,
O. Hadi, Abas
O.M, Ibragimov
O.T, Yunusov 
Obaid, Mayada Farah
Obaid Mostafa, Shaimaa
Obeis Al-Jariawi, Rasim Ahmed
Obi, Louis
Obied Babiker, Mohammed Ibrahem
Obinze Ebo, Henry
Obono, Godwin Ibiang
Oburota, Chukwuedo Susan
Odehouri-Koudou, Thierry, Department of Mother and Children (Pediatric Surgery), University Hospital Centre, Yopougon CÔTE D’IVOIRE
Ogawa, Shoko
Ogechukwu, Odezue, Loveth
Ogwuegbu, Happiness Odinakachi
Ojajuni , OA, Department of Surgery, University of Ilorin and University of Ilorin Teaching Hospital, Ilorin, Nigeria
Ojha, Priyanshu Krishna
Ojha, Shailesh
Ojha, Sourabh
Okafor, Henrietta Ifeoma
Oke, Avani
Okiemy M'Inserret, Ongoly, Department of Pediatric Surgery, Centre Hospitalier Universitaire de Reims (CHU de Reims)
Okon, Asidok, Nsikhe
Okon, Okon Etim
Okoro, Jude Omaka
Okram, Cuminious
Oktawati, Sri
Okulu, Emel, Ankara University School of Medicine
Okumuş, Mustafa, Yeni Yüzyıl University, Medical Faculty
OKUYUCU, Selçuk
Okvita Wiyogo, Illona
Olegovna Goryanina, Nadezhda
Oleti, Tejopratap, Fernandez hospital Hyderabad, India.
Olivera Ruano, Lourdes
Oliveros Rivero, Jorge, Dr. Roberto Gilbert Elizalde Children's Hospital. Guayaquil- Ecuador
Oliveros Rivero, Jorge, Dr. Roberto Gilbert Elizalde Children's Hospital. Guayaquil-Ecuador
Oliveros-Rivero, Jorge , Dr. Roberto Gilbert Elizalde Children` s Hospital/Universidad Catòlica Santiago de Guayaquil
Oliveros-Rivero, Jorge, Dr. Roberto Gilbert Elizalde Children's Hospital / Universidad Católica Santiago de Guayaquil. Guayaquil- Ecuador.
Oliveros-Rivero, Jorge, Dr. Roberto Gilbert Elizalde Children's Hospital. Guayaquil- Ecuador
Olivia J, Anto
Olson, Rohini, Department of Pediatric Surgery, Brody School of Medicine

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