title: Why can't demographers and physiologists agree? Issues of study design.
authors.affiliation: London School of Economics and Political Science, United Kingdom.
authors.forename: J N
authors.initials: JN
authors.lastname: Hobcraft
mesh_terms: D003710:Demography; D004777:Environment; D004812:Epidemiologic Methods; D005260:Female; D005298:Fertility; D006801:Humans; D007774:Lactation; D008297:Male; D010827:Physiology / Q000379:methods*; D011153:Population; D012107:Research Design