Subject	Treatment	Time	Y
1	Selective	Pre	51
1	Selective	Post	48
2	Selective	Pre	35
2	Selective	Post	55
3	Selective	Pre	66
3	Selective	Post	60
4	Selective	Pre	40
4	Selective	Post	35
5	Selective	Pre	39
5	Selective	Post	36
6	Selective	Pre	46
6	Selective	Post	43
7	Selective	Pre	52
7	Selective	Post	46
8	Selective	Pre	42
8	Selective	Post	54
9	Nonselective	Pre	34
9	Nonselective	Post	16
10	Nonselective	Pre	40
10	Nonselective	Post	36
11	Nonselective	Pre	34
11	Nonselective	Post	16
12	Nonselective	Pre	36
12	Nonselective	Post	18
13	Nonselective	Pre	38
13	Nonselective	Post	32
14	Nonselective	Pre	32
14	Nonselective	Post	14
15	Nonselective	Pre	44
15	Nonselective	Post	20
16	Nonselective	Pre	50
16	Nonselective	Post	43
17	Nonselective	Pre	60
17	Nonselective	Post	45
18	Nonselective	Pre	63
18	Nonselective	Post	67
19	Nonselective	Pre	50
19	Nonselective	Post	36
20	Nonselective	Pre	42
20	Nonselective	Post	34
21	Nonselective	Pre	43
21	Nonselective	Post	32