After publication of this work [1], we noted that we inadvertently failed to include the complete list of all coauthors. The full list of authors has now been added and the Authors' contributions and Competing interests section modified accordingly.
Competing interests
The authors declare that they have no competing interests.
Authors' contributions
WS and DB jointly designed the study and supervised all fieldwork. Additionally, WS analyzed and interpreted the data and drafted the manuscript. VC and AG co-supervised WS during study design, analysis and interpretation of data. VC gave further input in manuscript preparation, which was also contributed to by AG. HZ participated in the design and management of fieldwork. JZ and GC conceptualized the project, managed the coordination and oversaw all implementation activities. MS participated in the design of the study, providing technical and administrative support throughout the entire implementation of the research project. All authors read and approved the final manuscript.
Authors: Wuxiang Shi; Virasakdi Chongsuvivatwong; Alan Geater; Junhua Zhang; Hong Zhang; Daniele Brombal Journal: Health Res Policy Syst Date: 2011-04-06