trial number	start date	end date	 days	barrier status
1	7/12/2017	7/24/2017	13	off
2	7/25/2017	8/6/2017	13	on
3	8/9/2017	8/21/2017	13	off
4	8/29/2017	9/10/2017	13	on
5	9/20/2017	10/2/2017	13	off
6	10/3/2017	10/15/2017	13	on
7	7/17/2018	7/29/2018	13	off
8	7/31/2018	8/12/2018	13	on