Table 1. Characteristic of survival (in days) in male and female wild type (Wt), Cry1 deficient (Cry1^-/-), and Cry2 deficient (Cry2^-/-) mice.

Sex	genotype	n	mean survival (± s.e.m)	age at 50% survival	max survival (± sem)
Males	Wt	22	787 (47)	811	1018 (38)
	Cry1-/-	21	742 (59)	853	1018 (28)
	Cry2-/-	45	791 (31)	773	1017 (44)
Females	Wt	30	709 (31)	708	920 (28)
	Cry1-/-	20	807 (32)	810	971 (19)
	Cry2-/-	38	749 (26)	757	950 (27)