[1
]
Department of Gastroenterology and Alimentary Tract Surgery, Tampere University Hospital
and University of Tampere, Tampere, Finland.
[2
]
1] Department of Gastroenterology and Alimentary Tract Surgery, Tampere University
Hospital and University of Tampere, Tampere, Finland [2] Department of Medicine, Seinäjoki
Central Hospital, Seinäjoki, Finland.
[3
]
Research Department, The Social Insurance Institution, Turku, Finland.
[4
]
1] Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research,
Helsinki, Finland [2] School of Health Sciences, University of Tampere, Tampere, Finland.