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For the academic teaching hospital, the EC of \u00c4rztekammer Nordrhein also provided a waiver (80\/2022), pointing to the observational and quality-targeted nature of the study. For both sites, the IBRs declared that due to the data anonymization efforts, patients\u2019 informed consent for participation was not necessary as per GDPR articles 5, 6, 9 and 89 and in line with GDPR data privacy conformity (11.01.2022 \/ 07.04.2022). 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