Text and Data Mining valid from 2018-06-18
Received: 27 February 2018
Accepted: 7 May 2018
First Online: 18 June 2018
Ethics approval and consent to participate
: Ethical approval for the study was provided by the Ethical Committee of the Yokohama City Sports Medical Center (17.003; Yokohama, Japan) and the Medical Ethics Review Committee of the Academic Medical Center (W16_366#16.431; Amsterdam, The Netherlands). Informed consent was given by all participants.
: All authors have consented for publication.
: The authors declare that they have no competing interests.