Funding for this research was provided by:
First Online: 1 November 2019
Compliance with Ethical Standards
: All procedures performed 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 for studies involving human participants.
: Informed consent was obtained from all individual participants included in the study.
: V. Voorwinde and V.M. Monpellier are employed by the Dutch Obesity Clinic. I.M.C. Janssen is the medical director of the Dutch Obesity Clinic. The other authors declare that they have no conflict of interest.