Schroevers, Maya J. http://orcid.org/0000-0001-8518-9153
Fleer, Joke
Article History
First Online: 6 August 2019
Compliance with Ethical Standards
: The manuscript does not contain clinical studies or patient data. The letter summarizes research results that have been published elsewhere. All studies that we refer to have been approved by the ethical committee and been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. All persons gave their informed consent prior to their study inclusion.
: The authors declare that they have no conflict of interest.