one poster's well researched opinion, page-40

Looks to me like CANVAS is a stage 3 trial with a phase 2 placebo study.
This is not a delay as the endpoint of the phase 3 is still set for 2015.

""Cvac as Maintenance Treatment in Patients With EOC in Complete Remission Following First-Line Chemotherapy (CANVAS)
This study is currently recruiting participants.
Verified March 2012 by Prima BioMed Ltd


Condition - Epithelial Ovarian Cancer

Intervention / Phase
-----------------------------------
Biological: Placebo Study Agent / Phase II
Biological: Cvac / Phase III
""

""Estimated Study Completion Date: December 2015
Estimated Primary Completion Date: March 2015 (Final data collection date for primary outcome measure)""