Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sampling scheme for hair samples (see also Fig. 1)
| Spot | Days after first treatment | Weeks of grown hair |
|---|---|---|
| 1 | 0 (before treatment) | 8 |
| 2 | 7 | 9 |
| 3 | 14 | 10 |
| 4 | 21 | 11 |
| 5 | 28 | 12 |
| 6 (=1) | 35 | 5 |
| 7 (=2) | 42 | 5 |
| 8 (=3) | 49 | 5 |
| 9 (=4) | 56 | 5 |
| 10 (=5) | 63 | 5 |
| 11 (=1 = 6) | 70 | 5 |
| 12 (=2 = 7) | 77 | 5 |
| 13 (=3 = 8) | 84 | 5 |
| 14 (=4 = 9) | 91 | 5 |
| 15 (=5 = 10) | 98 | 5 |
