Y vector: responses at baseline, 3 months, 6 months 
Trt: values 1 to 4 corresponding to treatment order in Table 1.2 on
page 5 in the book

y[,1]	y[,2]	y[,3]	trt[]
131	NA	NA	1
36.099998474	NA	NA	1
37.599998474	NA	NA	1
64.199996948	NA	NA	1
60.5	NA	NA	1
70.800003052	NA	NA	1
51.599998474	NA	NA	1
39	NA	NA	2
52	NA	NA	2
63.400001526	NA	NA	2
28	NA	NA	2
85.599998474	NA	NA	2
71.5	NA	NA	2
67.099998474	NA	NA	2
46.5	NA	NA	2
28	NA	NA	2
40.599998474	NA	NA	2
117.30000305	NA	NA	2
54.599998474	NA	NA	2
123	122.40000153	NA	1
50.200000763	50.200000763	NA	1
35	31.700000763	NA	2
68.599998474	87.800003052	NA	2
57.5	67.099998474	NA	2
65.599998474	84.800003052	NA	2
50.200000763	47.900001526	50.200000763	1
42.799999237	58.299999237	47.900001526	1
51.599998474	60.5	55.299999237	1
60.5	79.699996948	69.300003052	1
29.5	81.900001526	75.199996948	1
50.200000763	71.5	74.5	1
106.90000153	101	107.69999695	1
104	117.30000305	90	1
38.400001526	52.400001526	50.900001526	1
56.799999237	55.299999237	63.400001526	1
67.900001526	72.300003052	59.700000763	1
84.099998474	112.80000305	95.099998474	1
71.5	96.599998474	85.599998474	1
51.599998474	84.800003052	59.700000763	1
91.5	118	96.599998474	1
78.199996948	98.800003052	83.300003052	1
58.299999237	81.900001526	64.199996948	1
42.799999237	56.799999237	55.299999237	1
43.5	43.5	42	1
83.300003052	105.5	86.300003052	1
30.200000763	50.900001526	50.900001526	1
76	78.199996948	55.299999237	1
36.900001526	56.799999237	51.599998474	1
105.5	128.30000305	108.40000153	1
97.400001526	113.59999847	108.40000153	1
98.800003052	91.5	87.800003052	1
46.5	45	47.200000763	1
90.699996948	120.19999695	98.099998474	1
36.900001526	67.099998474	47.200000763	1
63.400001526	81.900001526	88.5	1
64.199996948	89.199996948	91.5	1
74.5	52.708000183	82.599998474	2
120.19999695	110.59999847	118.69999695	2
84.800003052	118.69999695	99.599998474	2
47.900001526	55.299999237	57.5	2
92.900001526	79.699996948	87.5	2
98.800003052	88.5	97.400001526	2
48.581001282	41.299999237	21.399999619	2
45.700000763	50.900001526	47.200000763	2
64.199996948	85.599998474	68.599998474	2
81.099998474	62.700000763	75.199996948	2
126.09999847	132	146	2
83.300003052	97.400001526	92.900001526	2
50.900001526	59	58.299999237	2
47.200000763	60.5	61.200000763	2
84.800003052	104	110.59999847	2
92.199996948	113.59999847	95.900001526	2
61.799999237	127.59999847	140.8999939	2
87	140.1000061	130.5	2
86.300003052	98.800003052	92.900001526	2
110.59999847	127.59999847	126.09999847	2
73.800003052	127.59999847	79.699996948	2
54.599998474	51.599998474	53.799999237	2