Table 1.

Demographics.

Maternal characteristics (n=20)
Age (yr) Mean ± SD (range)	32.8 ± 4.0 (27 – 42)
Weight (kg) Mean ± SD (range)	65.9 ± 9.2 (42 – 81)
Race (No. of subjects)	White (15), Black (2), Asian (2), Pacific Islander (1)
CYP2D6 genotype (No. of subjects)	*1/*1 (4), *1/*2 (4), *2/*35 (1), *1/*9 (1), *1/*41 (1), *2/*10 (1), *2/*17 (1), *2/*41 (1), *1/*3 (1), *2/*4 (3), *2/*5 (1), *4/*35 (1)
Neonatal characteristics (n=20)
Age (wk) Mean ± SD (range)	16.2 ± 5.1 (13 – 37)
Weight (kg) Mean ± SD (range)	6.1 ± 0.9 (5.2 – 8.3)