Exam 2, ESPINA 2016
| Year 8, April 2016 | Saliva | Urine |
| Aliquot volume (mL) | 1 | 10 |
| N | 638 | 647 |
Exam 3, ESPINA 2016
| Year 8, Summer 2015 | Saliva | Urine | Hair | Serum | Serum | Plasma EDTA | Plasma EDTA | Plasma Heparin | Plasma Heparin |
| Aliquot volume (mL) | 1 | 5 | 1 | 0.5 | 1 | 0.5 | 1 | 0.5 | 1 |
| N | 1035 | 1611 | 533 | 3991 | 2030 | 2085 | 1024 | 2085 | 1020 |
Exam 4, ESPINA 2022
| Year 14, Summer 2022 | Saliva | Urine | Serum | Plasma EDTA | Plasma Heparin | Plasma Citrate | Buffy Coat |
| Aliquot Volume (mL) | 0.5 | 1.5 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 |
| N | 1830 | 5517 | 6619 | 5663 | 5085 | 1979 | 463 |
Exams 5-8, ESPINA EMCT
| Saliva | Urine | Hair | ||
| Aliquot Volume (mL) | 0.5 | 1.5 | 1 | |
| Year 15, Jan 2023 | N | 1360 | 4258 | 339 |
| Year 15, Jul 2023 | N | 747 | 2232 | 331 |
| Year 16, Jan 2023 | N | 743 | 2224 | 341 |
| Year 16, Jun 2023 | N |