Fig. 4From: Influence of platelet storage time on human platelet lysates and platelet lysate-expanded mesenchymal stromal cells for bone tissue engineeringCytokine concentrations in HPL from PCs stored for ≤ 4 or > 4 [5,6,7,8,9] months (m). Data represent means ± SD (n = 12 HPL batches per group). *p < 0.05, **p < 0.001Back to article page