Statement: The duration of treatment in the primary trial is half as long as in the secondary trial, but twice as frequent.
Primary_evidence: INTERVENTION 1:    Letrozole   Letrozole, 2.5 mg daily for six months
Secondary_evidence: INTERVENTION 1:    Celecoxib   Randomized to receive celecoxib daily for 12 months INTERVENTION 2:    Placebo   Randomized to receive placebo daily for 12 months