Then, the function is illustrated on a real dataset from a nationwide prospective observational cohort including patients with inflammatory bowel disease. (science.institut-curie.org)
They analysed the results of observational cohort studies and randomized controlled trials of both naturally circulating vitamin D and supplements (given singly as either vitamin D2 or D3 supplements). (sciencedaily.com)
«In observational cohort studies and a secondary prevention trial (the Lyon Diet Heart Study), increasing adherence to the Mediterranean diet has been consistently beneficial with respect to cardiovascular risk. (articles.mercola.com)