Table 1.

Sample sizes by self-reported races and sites.

	American Indian or Alaska Native	Asian	Black or African American	Unknown	White
Geisinger Health System	*	*	*	*	1023
Group Health Cooperative	*	*	*	*	252
Marshfield Clinic	*	*	*	*	1477
Mayo Clinic	*	*	*	47	1278
Mount Sinai	*	*	1148	343	185
Northwestern University	*	*	167	*	1306
Vanderbilt University	*	*	646	35	1472

^*indicates sample sizes less than 20.