In the pivotal phase III trial versus doxorubicin, 58/ 509 (11.4%) randomized subjects (10 treated with Caelyx at a dose of 50 mg/ m2/ every 4 weeks versus 48 treated with doxorubicin at a dose of 60 mg/ m2/ every 3 weeks) met the protocol-defined criteria for cardiac toxicity during treatment and/ or follow-up.