Table 1. Demographics of Serum Donors.

Group	n	Age		Sex
		Mean	Range	(% male)
Parkinson's Disease	29	74.0	53–88	55%
Alzheimer's Disease	50	78.5	61–97	40%
Multiple Sclerosis	10	46.0	27–59	30%
Breast Cancer	30	46.7	32–54	0%
Controls	40	40.4	19–86	82%
–Older Control	20	57.7	51–86	100%
–Younger Control	20	24.7	19–30	65%