Statement: the primary clinical trial intervention relies on a complex surgical procedure while the secondary trial employs an orally administered drug.
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]