		Fissures at V2, N (%)
V1, V2	Fissures at V1	Absent	Present	p-value
7, 15	Absent	103 (97.2)	3 (2.8)	<0.001
7, 15	Present	27 (62.8)	16 (37.2)	<0.001
15, 30	Absent	128 (99.2)	1 (0.8)	0.001
15, 30	Present	13 (72.3)	5 (27.8)	0.001
30, 60	Absent	125 (99.2)	1 (0.8)	0.18
30, 60	Present	4 (66.7)	2 (33.3)	0.18
60, 90	Absent	98 (98.0)	2 (2.0)	0.65
60, 90	Present	3 (100)	0	0.65
90, 120	Absent	78 (100)	0	-
90, 120	Present	2 (100)	0	-