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. 2014 Dec 31;9(12):e115988. doi: 10.1371/journal.pone.0115988

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© 2014 Chen et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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HWPR: health works per 10000 population ratio; HWCPR: health workers educated to college level or above per 10000 population ratio.