1. Department of Plastic and Reconstructive Surgery, Hospital Rudolfstiftung, Vienna, Austria.
2. Department of Rehabilitation Medicine, Vienna Medical University, Vienna, Austria.
3. Department of Biomedical Engineering and Physics, Vienna Medical University, Vienna, Austria.
4. Department of Radiology, Vienna Medical University, Vienna, Austria.
5. Core Unit for Medical Statistics and Informatics, Vienna Medical University, Vienna, Austria.