RADIUM-223 DICHLORIDE AND ABIRATERONE ACETATE COMPARED TO PLACEBO AND ABIRATERONE ACETATE FOR MEN WITH CANCER OF THE PROSTATE WHEN MEDICAL OR SURGICAL CASTRATION DOES NOT WORK AND WHEN THE CANCER HAS SPREAD TO THE BONE, HAS NOT BEEN TREATED WITH CHEMOTHERAPY AND IS CAUSING NO OR ONLY MILD SYMPTOMS: