Sexual behaviour in Britain: early heterosexual experience.
Wellings K, Nanchahal K, Macdowall W, McManus S, Erens B, Mercer CH, Johnson AM, Copas AJ, Korovessis C, Fenton KA, Field J.
Wellings K, et al. Among authors: mercer ch.
Lancet. 2001 Dec 1;358(9296):1843-50. doi: 10.1016/S0140-6736(01)06885-4.
Lancet. 2001.
PMID: 11741623