[1
]
Department of Clinical Science and Education Södersjukhuset (KI SÖS), Karolinska Institutet,
Stockholm, Sweden.
[2
]
Department of Surgery, Södersjukhuset, Stockholm, Sweden.
[3
]
Bilddiagnostiskt Centrum (BDC), Södersjukhuset, Stockholm, Sweden.
[4
]
Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.
[5
]
Center for Digestive Disease, Division of Coloproctology, Karolinska University Hospital,
Stockholm, Sweden.
[6
]
Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm,
Sweden.