Fecal samples and colon biopsies collected 2000-2006 in 2 parishes in Stockholm, comprising Swedish-born inhabitants aged 18-70 years. PopCol: population-level colonoscopy study

These data has been analysed in several studies, including an assessment of the correlation between IBS symptoms and gut microbiota, a prospective study of risk for diverticulitis based on gut microbiota and a catalogue of the healthy gut variation along the length of the large bowel.