Dhana, Klodian http://orcid.org/0000-0002-6397-7009
Zong, Geng
Yuan, Changzheng
Schernhammer, Eva
Zhang, Cuilin
Wang, Xiaobin
Hu, Frank B.
Chavarro, Jorge E.
Field, Alison E.
Sun, Qi
Article History
Received: 15 June 2017
Revised: 13 December 2017
Accepted: 22 January 2018
First Online: 3 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the Human Subjects Committees of the Harvard T. H. Chan School of Public Health and Brigham and Women’s Hospital. In NHSII and GUTS2 return of the questionnaire was considered as informed consent.