Study to Evaluate Overall Survival in Japanese Patients With HR+/HER2- Advanced Breast Cancer Treated With Palbociclib Plus Letrozole

Chiba cancer center, Chiba

National Hospital Organization Shikoku Cancer Center, Matsuyama

Hiroshima City Hiroshima Citizens Hospital, Hiroshima

National Hospital Organization Hokkaido Cancer Center, Sapporo

Kumamoto University Hospital, Kumamoto

Saitama Cancer Center, Kita-adachi-gun

National Cancer Center Hospital, Chuo-ku

National Hospital Organization Kyushu Cancer Center, Fukuoka

Hakuaikai Medical Corporation Sagara Hospital, Kagoshima

Kumamoto Shinto General Hospital, Kumamoto

Kyoto University Hospital, Kyoto

Aichi Cancer Center, Nagoya

National Hospital Organization - Osaka National Hospital - Institute For Clinical Research, Osaka