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Leave empty for all.", "items": { "type": "string", "enum": [ "RECRUITING", "NOT_YET_RECRUITING", "ACTIVE_NOT_RECRUITING", "COMPLETED", "ENROLLING_BY_INVITATION", "SUSPENDED", "TERMINATED", "WITHDRAWN", "UNKNOWN" ], "enumTitles": [ "Recruiting", "Not yet recruiting", "Active, not recruiting", "Completed", "Enrolling by invitation", "Suspended", "Terminated", "Withdrawn", "Unknown" ] } }, "studyType": { "title": "Study type", "enum": [ "any", "interventional", "observational", "expanded_access" ], "type": "string", "description": "Interventional studies test a treatment; observational studies watch without assigning one.", "default": "any" }, "sort": { "title": "Sort order", "type": "string", "description": "For example LastUpdatePostDate:desc, StartDate:desc or EnrollmentCount:desc. 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