Authors: Li Liu, Mengying Li, Li Yang, Lirong Ju, Biqin Tan, Neff Walker, Jennifer Bryce, Harry Campbell, Robert E. Black, Yan Guo
Journal: PLOS ONE
Date Published: 7 May 2013
This article is a part of a Special Collection of PLOS titled Measuring Coverage in Maternal, Newborn, and Child Health. This collection presents innovative assessments of the validity of measuring population with a variety of articles, videos, and blog posts.