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.AuthorsRak, Janusz; Miller, Fred R.PublicationInternational Journal of Cancer, 1993, Vol 54, Issue 3, p524ISSN0020-7136Publication typeArticleDOI10.1002/ijc.2910540328