Characteristic	N	Drug A1	Drug B1	p-value2
I, T1
	17	1 (13%)	5 (56%)	0.13
I, T2
	17	3 (38%)	1 (11%)	0.3
I, T3
	18	4 (36%)	3 (43%)	>0.9
I, T4
	15	0 (0%)	4 (57%)	0.026
II, T1
	22	3 (21%)	3 (38%)	0.6
II, T2
	16	1 (14%)	3 (33%)	0.6
II, T3
	9	1 (25%)	3 (60%)	0.5
II, T4
	16	2 (40%)	3 (27%)	>0.9
III, T1
	13	3 (50%)	3 (43%)	>0.9
III, T2
	19	2 (22%)	3 (30%)	>0.9
III, T3
	13	3 (60%)	1 (13%)	0.2
III, T4
	18	5 (50%)	1 (13%)	0.2
1 n (%)
2 Fisher’s exact test