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. 2017 Feb 2;13(3):636–644. doi: 10.1080/21645515.2016.1248009

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© 2017 The Author(s). Published with license by Taylor & Francis

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The moral rights of the named author(s) have been asserted.

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Figure 1. — Flow of participants through the study. ATP = according-to-protocol cohort for persistence; TVC = total vaccinated cohort; N = number of participants in each group.