Skjeldestad misrepresents Norwegian oral contraceptive use.
Rygh
L H
LH
Gadeholt
G
G
D003267:Contraception / Q000379:methods / Q000706:statistics & numerical data / Q000639:trends*; D003276:Contraceptives, Oral / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D009664:Norway; D013997:Time Factors
D003276:Contraceptives, Oral