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Article History

Received: 20 December 2020

Accepted: 14 October 2021

First Online: 24 October 2021

Declarations

:

: Ethics approval was obtained of the Medical Ethics Committee of the Medical Faculty Heidelberg (S-496/2018) prior to the start of the study in August 2018 by the Heidelberg Team. Additionally, each study in each implementation site has received ethical approval from a local institutional review board prior to the start of the study:Name of the committee for Zagreb, Croatia: Ethics Committee of the University Hospital Centre (UHC) Zagreb; Ethical approval: 18.07.2018, Number: 02/21 AG, Class 8.1–18/149–2.Name of the committee for Kotor, Montenegro: Ethics Committee of the HI Specialized Psychiatric Hospital Dobrota Kotor, Ethical approval: 28.09.2018, Number 3463/1.Name of the committee for Suceava, Romania: Ethics Council Chronic Psychiatric Hospital Siret, Ethical approval: 21.11.2018.Name of the committee for Skopje, North Macedonia: Ethical Committee for Research on Human Subjects, Medical Faculty, SS Cyril and Methodius University Skopje, Skopje, North Macedonia; Ethical approval: 21.05.2018.Name of the committee for Sofia, Bulgaria: Commission of Ethics at the National Centre of Public Health and Analyses, Sofia, Bulgaria; Ethical approval: 25.01.2019.The study was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments.Written informed consent was obtained from all participants before enrolment.

: Not applicable.

: The authors declare that they have no conflict of interest.