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. 2020 Aug 29;127(12):1651–1662. doi: 10.1007/s00702-020-02243-6

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Flow chart of patient selection. CHD coronary heart disease, FU follow-up. The figure shows the selection and exclusion of study participants, response rates, and drop-outs. Participants who permanently dropped out and those who further participated in the study after not having returned one or two questionnaires are listed separately