DescriptionBMJ. 1997 Jun 28;314(7098):1874super:Linkhttps://go.openathens.net/redirector/neco.edu?url=https%3A%2F%2Fwww.bmj.com%2Fcontent%2F314%2F7098%2F1874%2Farticle-infoAuthor(s) or Editor(s)Altman DG, Bland JM
