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. 2014 Oct 30;10(9):2603–2611. doi: 10.4161/21645515.2014.970075

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The Author(s). Published with license by Taylor & Francis Group, LLC

This is an Open Access article distributed under the terms of the Creative Commons Attribution-Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted non-commercial 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. — Sample selection.

^a‘Returned to sender’ by the post office with no forwarding address.

^bThe original sample included 17 children who had received no vaccines. These children were excluded from this analysis because (1) Children who receive no vaccines are a group distinct from those who start but do not complete immunizations^4,14 and (2) Survey questions regarding experiences with immunization services were not applicable to this group.