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Article History

Received: 28 August 2020

Revised: 11 November 2020

Accepted: 10 December 2020

First Online: 15 February 2021

Compliance with ethical standards

:

: The scientific guarantor of this publication is Prof. Marleen Huysman (m.h.huysman@vu.nl).

: The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.

: No complex statistical methods were necessary for this paper.

: Institutional Review Board approval was not required because it is based on reviewing the applications available in the market.

: • multicenter study (as a review of training programs worldwide)