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Contributors MIM, OK, ML, R-IE, AKB and CL were involved in the conception and design. HH, CMM, IK, SS, AFK, TL and CL were involved in the development of methodology. MIM, OK, CMM, IK, AFK, TL and CL were responsible for the acquisition of data. MIM, OK, HH, ML, CMM, IK, AFK, TL and CL contributed to the analysis and interpretation of data. HH, CMM, SS, TL, R-IE and AKB were involved in the administrative, technical, or material support. ML, R-IE, AKB and CL supervised the study. All authors contributed to the writing, review, and/or revision of the manuscript.
Competing interests None declared.
Patient consent Not required.
Ethics approval Ethics committee of the University of Würzburg.
Provenance and peer review Not commissioned; externally peer reviewed.