1 a Division of Clinical Cancer Epidemiology, Department of Oncology , Institute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg , Gothenburg , Sweden.
2 b Department of Oncology and Pathology, Division of Clinical Cancer Epidemiology , Karolinska Institutet , Stockholm , Sweden.
3 c Department of Pharmacology , Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg , Gothenburg , Sweden.
4 d Department of Surgery , Lund University, SUS Malmö , Malmö , Sweden.
5 e Department of Oncology , Institute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg , Gothenburg , Sweden.