Professor Clemens Aigner is the director of the Department of Thoracic Surgery and Thoracic Endoscopy, Ruhrlandklinik-University Clinic Essen. He is a professor at the Medical Faculty of the University of Duisburg-Essen (UDE). Prof. Aigner was previously a senior physician at the Department of Thoracic Surgery at the Medical University of Vienna. He is specialized in performing lung cancer surgery. In 2008, Prof. Aigner was qualified as a professor for “Advanced Techniques in Lung Transplantation”. He has received numerous prizes for his research. Once he was awarded the “Theodor-Billroth-Prize of the Austrian Society for Surgery” for the best scientific work in the field of clinical and experimental surgery. The Department of Thoracic Surgery in Ruhrlandklinik, where Prof. Aigner had been working since 2016, is one of the largest thoracic surgical departments in Germany. It focuses on studying lung cancer and oncological lung surgery.