Associate Professor Dr. Christian-Alexander Behrendt (MD) is senior consultant vascular and endovascular surgeon and senior clinical lecturer in vascular surgery. He is fellow member of the European Society for Vascular Surgery (ESVS) and elected international member of the Society of Vascular Surgery (SVS). Christian is head of the research group GermanVasc (www.germanvasc.de) and deputy clinic director at the University Medical Centre Hamburg-Eppendorf (UKE), Department of Vascular Medicine, Hamburg, Germany. His main field in clinical care is lower extremity peripheral artery disease (PAD). He has published more than 170 peer-reviewed original contributions and reviews (more than 50 of them as first or last author in highly-ranked scientific journals, 1st quartile in surgery, h-index >22). His research group GermanVasc currently employs four full time scientists and experienced statisticians. Between 2014 and 2020, Christian became an expert in real-world-evidence research using health insurance claims data and registries for vascular research and quality improvement. His main field of interest in research are health services research, real-world-evidence, medical device research, big data, and comparative outcome research. Christian is current chairman of the VASCUNET collaboration, a cross-border network comprising 28 national and international quality improvement registries in vascular medicine. He is founding member of the International Consortium of Vascular Registries (ICVR) and the Medical Device Epidemiology Network (MDEpiNet), where he serves as chairman and executive director of the German chapter. Christian is principal investigator of numerous prior and ongoing registry studies in Germany (PSI-Registry, EQS-Registry, L-ACMAG, CORONA, IDOMENEO, RABATT). He is currently leading two large multistage multimethodological projects on the treatment of PAD in Germany (IDOMENEO, 01VSF16008, ClinicalTrials.gov NCT03098290 and RABATT, 01VSF18035). As a member of the scientific steering committee and co-spokesman of the research council of the Hamburg City Health Study (HCHS), he is involved in the largest population-based epidemiological cohort study on chronic diseases.