Research index·Journal articleCorrectionNature·1 Feb 2003·Open accessDOI10.1038/nj6924-768bJournal articleOpen accessCorrectionNature · 2003DOI10.1038/nj6924-768bReadRead PDFSaveCiteAdd to literature reviewDiscussionAdd to the discussionTopicsHumanityLibrary sciencePolitical sciencePhysicsRelated papersMoreDetailsPublished, publisher, issueSuggest a correction or report