1. Occult blood testing for detection of asymptomatic colon cancer. Author Greegor DH Subjects Barium Sulfate, Disposable Equipment, Diverticulum, Colon diagnosis, Enema, Filtration, Guaiac, Humans, Intestinal Polyps diagnosis, Mass Screening, Paper, Colonic Neoplasms diagnosis, Occult Blood Published 1971 Full Text View/download PDF