An, Qian
,
Song, Ruiguang
Finlayson, Teresa J.
Sionean, Catlainn
Wejnert, Cyprian
Article History
First Online: 12 October 2018
Compliance of Ethical Standards
:
: None of the authors has a conflict of interest as regards this publication or the research on which it was based.
: The study is in compliance with ethical standards of institutional review boards (IRBs) in each participating city.