Table 1
Preservation of serum in refrigerator
Preservation
EGF (ng/ml)
Vitamin A (μg/dl)
TGF-β1 (ng/ml)
Initial day
0.51 (0.08)
45.5 (19.1)
33.2 (6.8)
1 week
0.50 (0.10)
45.5 (19.0)
32.9 (81)
1 month
0.51 (0.08)
49.7 (20.5)
32.1 (4.7)