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. 2016 Jul 11;9:339. doi: 10.1186/s13104-016-2141-0

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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Flow of participants. Recruitment (approached, eligible/not eligible and agree/refuse to participate) and data collection (test, lost to follow-up/retest). Numbers in parenthesis are presented in this order: pregnant women receiving care from family physicians, midwives or obstetricians–gynecologists