Received: 21 December 2019
Accepted: 21 July 2020
First Online: 29 July 2020
Ethics approval and consent to participate
: This study was carried out according to the ethical guidelines of the 1975 Declaration of Helsinki. The medical ethics committee of the Amsterdam University Medical Center (location AMC) decided that the study was beyond the scope of the Medical Research Involving Human Subjects Act (WMO) and therefore does not require institutional review board approval (W18_164). Many undocumented migrants do not feel comfortable with providing their written name or signature on paper and therefore we requested that all participants provide verbal informed consent to participate. All participants were able to withdraw consent to participate in the study at any time without clarification.
: Not applicable.
: The authors declare that they have no competing interests related to the study..