| Stored at 4 °C |  | Freeze/thaw | ||||
---|---|---|---|---|---|---|---|
 | Mean, pmol/L | SD, pmol/L | Deviation, % |  | Mean, pmol/L | SD, pmol/L | Deviation, % |
Day 1 | 5.96 | 0.16 | 0.00 | Fresh | 5.96 | 0.16 | 0.00 |
Day 2 | 5.83 | 0.09 | −2.29 | x1 | 5.96 | 0.08 | −0.11 |
Day 3 | 5.77 | 0.03 | −3.24 | x2 | 5.87 | 0.04 | −1.57 |
Day 4 | 5.92 | 0.04 | −0.67 | x3 | 5.91 | 0.14 | −0.89 |
Day 5 | 5.75 | 0.18 | −3.58 | x4 | 5.74 | 0.09 | −3.80 |
Day 6 | 6.09 | 0.05 | 2.07 | x5 | 5.81 | 0.18 | −2.63 |
Day 7 | 5.75 | 0.01 | −3.52 | x6 | 5.74 | 0.04 | −3.75 |
Day 8 | 5.83 | 0.22 | −2.24 | x7 | 5.78 | 0.07 | −3.13 |