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Twin–Twin Transfusion Syndrome: study protocol for developing, disseminating, and implementing a core outcome set

  • Asma Khalil1Email authorView ORCID ID profile,
  • Helen Perry1,
  • James Duffy2,
  • Keith Reed3,
  • Ahmet Baschat4,
  • Jan Deprest5,
  • Kurt Hecher6,
  • Liesbeth Lewi5,
  • Enrico Lopriore7,
  • Dick Oepkes8 and
  • On behalf of the International Collaboration to Harmonise Outcomes for Twin–Twin Transfusion Syndrome (CHOOSE)

Received: 19 January 2017

Accepted: 16 June 2017

Published: 14 July 2017

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Open Peer Review reports

Pre-publication versions of this article and author comments to reviewers are available by contacting

Original Submission
19 Jan 2017 Submitted Original manuscript
20 Mar 2017 Reviewed Reviewer Report - maria bryant
19 Apr 2017 Reviewed Reviewer Report - Oriana Ciani
16 Jun 2017 Author responded Author comments - Asma Khalil
Resubmission - Version 2
16 Jun 2017 Submitted Manuscript version 2
16 Jun 2017 Editorially accepted
14 Jul 2017 Article published 10.1186/s13063-017-2042-0

How does Open Peer Review work?

Open peer review is a system where authors know who the reviewers are, and the reviewers know who the authors are. If the manuscript is accepted, the named reviewer reports are published alongside the article. Pre-publication versions of the article and author comments to reviewers are available by contacting All previous versions of the manuscript and all author responses to the reviewers are also available.

You can find further information about the peer review system here.

Authors’ Affiliations

St George’s University of London, London, UK
Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
Twin and Multiple Births Association (TAMBA), The Manor House, Aldershot, UK
The Johns Hopkins Center for Fetal Therapy, Baltimore, USA
Department of Obstetrics and Gynecology, University Hospitals of KU Leuven, Leuven, Belgium
Department of Obstetrics and Fetal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
Department of Pediatrics, Leiden University Medical Center, Leiden, The Netherlands
Division of Fetal Medicine, Department of Obstetrics, Leiden University Medical Center, Leiden, The Netherlands