TABLE 1:

Peak systolic and diastolic velocities in the normal control volunteers

Volunteer No.	Age (yr)	Peak Systolic Velocity	Peak Diastolic Velocity
1	61	2.1	2.4
2	36	1.7	2.1
3	28	2.0	1.6
4	21	2.7	4.2
5	33	2.9	1.9
6	48	1.2	2.1
7	41	2.2	4.5
8	47	2.4	2.5
9	46	3.3	3.5
10	30	3.1	2.9
Average	39.1	2.36	2.77