Table 1.

Characterization of human subjects participating in this study

Group	Gender	Age range	Disorder
Controlsa	6 males, 11 females, 3 unknown	24–93 median 55	Normal
Arthritis patients	10 males, 12 females	25–77 median 45	Rheumatoid arthritis (13)b; psoriatic arthritis (6); undifferentiated spondyloarthropathy (3)
Neurology patients	13 males, 6 females, 3 unknown	23–87 median 58	PD or PD tremor (13); brain stem stroke (3); other (6)
TSS patients	6 males, 7 females, 4 unknown	< 1–76 median age unknown	Mild TSS (1) to severe TSS (most others)
HIV patients	10 males, 2 females	26–59 median 41–42	Early/presymptomatic (6); acute (2); AIDS (4)

^aThe control group for the HIV patients not listed here included 4 males, ages 28–43, confirmed as uninfected.

^bNumbers of subjects.