Statement: in the primary trial, patients are given multiple drugs via injection, while the secondary trial is a drug-free intervention based on physical therapy.
Primary_evidence: INTERVENTION 1:    Letrozole   Participants received 2.5 milligram (mg) of Letrozole tablets orally once daily (QD) for a period of 24 weeks.
Secondary_evidence: INTERVENTION 1:    Sentinel Lymph Node Biopsy [Not Specified]