Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (145961, 164726)
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (158792)
National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR063705)
Article History
Received: 5 April 2017
Revised: 6 July 2017
Accepted: 2 September 2017
First Online: 7 September 2017
Compliance with ethical standards
:
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflict of interest.