Disease progression and tumor response (number of participants achieving a complete response [CR] or partial response [PR]), using standardized criteria (Response evaluation criteria in solid tumors). CR, disappearance of all target lesions; PR, 30% decrease in the sum of the longest diameter of target lesions; progressive disease, 20% increase in the sum of the longest diameter of target lesions; stable disease, small changes that do not meet above criteria. Disease assessment was done at baseline and then every 8 weeks after starting treatment, until the participant discontinued treatment.