title: [Property of data and fertility decline].
authors.forename: Alfred
authors.initials: A
authors.lastname: Spira
mesh_terms: D003718:Denmark / Q000453:epidemiology; D006801:Humans; D007248:Infertility, Male / Q000453:epidemiology*; D018973:Intellectual Property; D008297:Male; D013076:Sperm Count