Annals of EpidemiologyVolume 8, Issue 5, July 1998, Pages 286-288EditorialAuthor links open overlay panelShow moreShareCitehttps://doi.org/10.1016/S1047-2797(98)00019-2Get rights and contentRecommended articlesReferences (0)Cited by (0)View full textCopyright © 1998 Published by Elsevier Inc.