Table 1.

Composition of Families Used for Two Whole-Genome Screens

Variable	Twins	EDAC
No. of families	1,094	254
Total no. of individuals	2,188	587
No. of possible sib pairs	1,094	444
No. of sibs in family:
2	1,094	198
3	0	39
4	0	13
5	0	3
7	0	1