The People's League of Health trial.
Olsen
Sjúrdur Fródi
SF
Maternal Nutrition Group, Danish epidemiology Science Centre, Statens Serum Institut, Copenhagen, Denmark. so@ssi.dk
D003695:Delivery of Health Care / Q000266:history*; D006304:Health Status; D049673:History, 20th Century; D006801:Humans; D006113:United Kingdom