Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleOccult Gastrointestinal Blood Loss in Marathon Runners.AuthorsMcMahon Jr., Laurence F.; Ryan, Michael J.; Larson, Daniel; Fisher, Rosemarie L.AbstractDeals with a study which showed that occult gastrointestinal blood loss occurs after a marathon as defined by guaiac testing. Concern on the high prevalence of aspirin and nonsteroidal drug use; Findings of the study.SubjectsGUAIAC; GASTROINTESTINAL systemPublicationAnnals of Internal Medicine, 1984, Vol 100, Issue 6, p846ISSN0003-4819Publication typeArticleDOI10.7326/0003-4819-100-6-846