'list', 'cadence' => 'string', 'country' => 'string', 'created_time' => 'datetime', 'description' => 'string', 'end_time' => 'datetime', 'id' => 'string', 'modified_time' => 'datetime', 'owner_instance_id' => 'string', 'owner_panel_id' => 'string', 'owner_panel_name' => 'string', 'start_time' => 'datetime', 'status' => 'Status', 'study_type' => 'StudyType', ); } }