J M Grant, D G Altman. Show Affiliations »
Abstract
Mesh: See more » Data Collection/methodsObstetrics/statistics & numerical dataRandom AllocationSurveys and QuestionnairesUnited Kingdom
Year: 1993 PMID: 8399005 DOI: 10.1111/j.1471-0528.1993.tb14257.x
Source DB: PubMed Journal: Br J Obstet Gynaecol ISSN: 0306-5456