Participants who ended treatment but had not yet progressed (e.g. unacceptable toxicities or withdrawal of consent) were be followed every 8 weeks with a complete tumor assessment until documented progression or further anti-tumor therapy. Then, they would be followed every 3 months after progression for survival status; date of death or progression were reported. Participants who ended treatment for progression, were to be followed every 3 months until death. Date of death was reported. The planned duration of the study was 30 months.