Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleLetter to the Editor.AuthorsXie, Changchun; Chen, Ding‐GengPublicationBiometrical Journal, 2013, Vol 55, Issue 2, p264ISSN0323-3847Publication typeArticleDOI10.1002/bimj.201200116