Funding for this research was provided by:
Received: 1 January 2021
Accepted: 30 April 2021
First Online: 20 May 2021
: Ethical approval for the HANDSOME study was waived by the Medical Ethics Review Committee of Erasmus MC, University Medical Center Rotterdam (reference no. 58158), since the residents were not subjected to sampling, treatments or behavior rules.
: Not applicable.
: The authors declare that they have no competing interests.