Time of day variation in rates of obstetric intervention to assist in vaginal delivery
Webb D, Culhane J. Time of day variation in rates of obstetric intervention to assist in vaginal delivery. Journal Of Epidemiology & Community Health 2002, 56: 577. PMID: 12118047, PMCID: PMC1732224, DOI: 10.1136/jech.56.8.577.Peer-Reviewed Original Research