David Spiegel, Division of Orthopaedic Surgery, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, United States
David Spiegel, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, United States
Shikshya Shrestha, Kathmandu Model Hospital, Adwait Marg, Kathmandu 44600, Nepal
Prakash Sitoula, Department of Orthopedics, Nobel Medical College Teaching Hospital, Kanchanbari, Biratnagar 56700, Nepal
Norma Rendon, Center for Fetal Diagnosis and Treatment, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, United States
John Dormans, Department of Orthopaedic Surgery, Texas Children’s Hospital, Houston, TX 77030, United States
Author contributions: Spiegel D and Dormans J came up with the study questions; Spiegel D, Shrestha S, Sitoula P and Rendon N contributed to the study design and IRB application; Spiegel D, Shrestha S, Sitoula P and Rendon N reviewed all of the studies and collected the data; Spiegel D was the primary author of the manuscript; Shrestha S and Sitoula P were secondary authors; Rendon N and Dormans J reviewed the manuscript and provided critical revisions; all authors provided final approval for the article.
Institutional review board statement: The study was reviewed and approved by the Children’s Hospital of Philadelphia’s Institutional Review Board.
Informed consent statement: A waiver of informed consent has been granted by the Children’s Hospital of Philadelphia’s Institutional Review Board to conduct this retrospective study.
Conflict-of-interest statement: The authors declare that they have no conflicts of interest related to this work. Dr. Spiegel has received royalties from Springer for co-editing a textbook.
Data sharing statement: The data is available at request from the corresponding author.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: David Spiegel, MD, Pediatric Orthopaedic Surgeon, Associate Professor of Orthopaedic Surgery, Division of Orthopaedic Surgery, Children’s Hospital of Philadelphia, 2nd Floor Wood Building, 34th Street and Civic Center Blvd., Philadelphia, PA 19104, United States. firstname.lastname@example.org
Telephone: +1-215-5901524 Fax: +1-215-5901501
Received: January 4, 2017
Peer-review started: January 6, 2017
First decision: February 17, 2017
Revised: March 20, 2017
Accepted: April 6, 2017
Article in press: April 10, 2017
Published online: November 18, 2017