Treatment group
  100 mg intravenous bolus (n=6) 200 mg intravenous bolus (n=6) 500 mg intravenous bolus (n=6)
Gender, n (%)
Men 4(66.7) 4(66.7) 4(66.7)
Women 2(33.3) 2(33.3) 2(33.3)
Age (years)      
Mean (SD) 58 (17) 50 (18) 52 (8)
Race, n (%)
African American 6(100.0) 6(100.0) 6(100.0)
Weight (kg)
Mean (SD) 92 (23) 91 (19) 105 (18)
Height (cm)
Mean (SD) 171(7) 171(9) 173(10)
Smoking status, n (%)
Yes 3(50.0) 2(33.3) 4(66.7)
No 3(50.0) 4(66.7) 2(33.3)
Table 1: Demographical characteristics of the treatment groups.