title: Look before you leap: can we draw causal conclusions from breastfeeding research?
authors.forename: Nathan C
authors.initials: NC
authors.lastname: Nickel
mesh_terms: D001942:Breast Feeding; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D064887:Observational Studies as Topic; D011247:Pregnancy; D016032:Randomized Controlled Trials as Topic; D012107:Research Design