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Centering and Racial Disparities (CRADLE study): rationale and design of a randomized controlled trial of centeringpregnancy and birth outcomes

  • Liwei Chen1Email author,
  • Amy H. Crockett2,
  • Sarah Covington-Kolb2,
  • Emily Heberlein3,
  • Lu Zhang1 and
  • Xiaoqian Sun4
Contributed equally
BMC Pregnancy and ChildbirthBMC series – open, inclusive and trusted201717:118

Received: 4 March 2017

Accepted: 25 March 2017

Published: 13 April 2017

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Open Peer Review reports

Pre-publication versions of this article are available by contacting

Original Submission
4 Mar 2017 Submitted Original manuscript
22 Mar 2017 Author responded Author comments - Liwei Chen
Resubmission - Version 2
22 Mar 2017 Submitted Manuscript version 2
25 Mar 2017 Editorially accepted
13 Apr 2017 Article published 10.1186/s12884-017-1295-7

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 are available by contacting

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

Authors’ Affiliations

Department of Public Health Sciences, Clemson University, Clemson, USA
Department of Obstetrics and Gynecology, Greenville Health System, Greenville, USA
Georgia Health Policy Center, Andrew Young School of Policy Studies, Georgia State University, Atlanta, USA
Department of Mathematical Sciences, Clemson University, Clemson, USA