Table 1.

Healthy volunteers included in the study.

Subject	Agea	Gender	Time gap scans a) and b) [months]	Time gap scans a) and c) [months]
A	26	f	14	16
B	21	m	23	24
C	41	f	14	16
D	25	f	23	23
E	21	f	21	21
F	25	f	28	30
G	25	f	28	28
H	28	f	20	20
I	21	m	21	21
J	22	f	23	23
K	26	m	28	30
L	35	m	16	16
M	23	f	23	23
N	21	f	20	20

^aAge at the time of the first scan.