| the manitoba inflammatory bowel disease cohort study: a prospective longitudinal evaluation of the use of complementary and alternative medicine services and products. | objective to determine the prevalence of complementary and alternative medicine (cam) use over time in a population-based cohort of patients with inflammatory bowel disease (ibd). methods the manitoba ibd cohort study is a longitudinal, population-based study of multiple determinants of health outcomes in an ibd cohort. participants completed semi-annual surveys, and annual in-person interviews. enquiries about the use of 12 types of cam service providers and 13 cam products, based on items from ... | 2011 | 21836028 |