Norwegian colorectal cancer prevention
Bretthauer et al., “NORCCAP (Norwegian colorectal cancer prevention): a randomised trial to assess the safety and efficacy of carbon dioxide versus air insufflation in colonoscopy,” Gut, vol.
Bretthauer et al ., “NORCCAP ( Norwegian colorectal cancer prevention ) : a randomised trial to assess the safety and efficacy of carbon dioxide versus air insufflation in colonoscopy,” Gut, vol .