Funding for this research was provided by:
Fogarty International Center (R25 TW009340)
National Institute of Arthritis and Musculoskeletal and Skin Diseases (K24 AR060231-01)
Received: 6 March 2017
Accepted: 22 January 2018
First Online: 30 January 2018
Ethics approval and consent to participate
: This study was reviewed and approved by the institutional review board of the Cancer Hospital, Chinese Academy of Medical Sciences (approval reference number: 12–133/667) and the Human Investigation Committee of Yale School of Medicine (approval reference number: 1,301,011,316) prior to initiation. All procedures performed in this study involving human participants were performed in accordance with the ethical standards laid down in the 1964 <i>Declaration of Helsinki</i> and its later amendments. Written informed consent was obtained from all individual participants included in the study.
: Not applicable
: The authors declare that they have no competing interests.
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