About the Authors
UTS China Research Centre, University of Technology, Sydney, Australia
Institute for Global Health, Peking University, Beijing, China
Health Science Center, Peking University, Beijing, China
The authors have declared that no competing interests exist.
ICMJE criteria for authorship read and met: LHC LC JX. Wrote the first draft of the paper: LHC. Contributed to the writing of the paper: LHC LC JX. Enrolled interviewees: JX.