Familial colorectal cancer risk in half siblings and siblings : Nationwide cohort study
Objective: To explore the risk of colorectal cancer in family members of patients with colorectal cancer, with an emphasis on subtypes of second degree relatives, especially half siblings, which were lacking in the literature. Design: Ambidirectional cohort study. Setting: Nationwide Swedish Family Cancer Data (record linkage). Participants: All people residing in Sweden and born after 1931, with
