A Time to Pregnancy Questionnaire Designed for Long Term Recall: Validity in Oxford, England

Autor: Joffe, Michael, Villard, Laurence, Li, Zhimin, Plowman, Rosalind, Vessey, Martin
Zdroj: Journal of Epidemiology and Community Health (1979-), 1995 Jun 01. 49(3), 314-319.
Databáze: JSTOR Journals