- Patients must be accessible for treatment and follow up. Patients registered on this trial must be treated and followed at the participating centre. This implies there must be reasonable geographical limits (for example: 1 ½ hour's driving distance) placed on patients being considered for this trial. The patient's city of residence may be required to verify their geographical proximity. Investigators must assure themselves the patients registered on this trial will be available for complete documentation of the tretment, adverse events, and follow-up.