{"groups":[{"description":"Patients receive oral letrozole once daily for up to 5 years.\n\nLetrozole: Letrozole 2.5 mg taken orally once daily for 5 years","id":"FG000","title":"Group 2 Letrozole"},{"description":"Patients receive oral placebo once daily for up to 5 years.\n\nPlacebo: Placebo tablet taken orally once daily for 5 years","id":"FG001","title":"Group 1 Placebo"}],"periods":[{"dropWithdraws":[{"reasons":[{"groupId":"FG000","numSubjects":"17"},{"groupId":"FG001","numSubjects":"19"}],"type":"No follow up data mapped to Other"},{"reasons":[{"groupId":"FG000","numSubjects":"7"},{"groupId":"FG001","numSubjects":"0"}],"type":"Patient not at risk for primary endpoint mapped to Other"},{"reasons":[{"groupId":"FG000","numSubjects":"9"},{"groupId":"FG001","numSubjects":"11"}],"type":"No clinical assessment"}],"milestones":[{"achievements":[{"groupId":"FG000","numSubjects":"1983"},{"groupId":"FG001","numSubjects":"1983"}],"type":"STARTED"},{"achievements":[{"groupId":"FG000","numSubjects":"1950"},{"groupId":"FG001","numSubjects":"1953"}],"type":"COMPLETED"},{"achievements":[{"groupId":"FG000","numSubjects":"33"},{"groupId":"FG001","numSubjects":"30"}],"type":"NOT COMPLETED"}],"title":"Overall Study"}]}