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aDepartment of Surgery (Platell, Hall), The University of Western Australia, Perth, Australia bDepartment of Pathology (Papadimitriou), The University of Western Australia, Perth, Australia fracs *Correspondence address: Professor John C Hall, University Department of Surgery, Royal Perth Hospital, Perth WA 6000, Australia Received December 2, 1999; Revised April 13, 2000; Accepted August 1, 2000. No competing interests declared.
Platell et al. (Fri,) studied this question.
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