1. Department of Dermatology and Venerology, Skåne University Hospital (SUS Malmö) , Jan Waldenströms gata 18, S-205 02 Malmö , Sweden
2. Department of Surgery , Colorectal Unit, , S-205 02 Malmö , Sweden
3. Skåne University Hospital (SUS Malmö) , Colorectal Unit, , S-205 02 Malmö , Sweden