- Patient consent must be obtained according to local Institutional and/or University Human Experimentation Committee requirements. It will be the responsibility of the local participating investigators to obtain the necessary local clearance, and to indicate in writing to the NCIC CTG Clinical Trials Coordinator that such clearance has been obtained, before the trial can commence in that centre. Because of differing requirements, a standard consent form for the trial will not be provided but a sample form is given. The patient must sign the consent form prior to randomization. Please note that the consent form for this study must contain a statement which gives permission for the NCICCTG and monitoring agencies to review patient records.