Fig. 4From: Fluid-induced, shear stress-regulated extracellular matrix and matrix metalloproteinase genes expression on human annulus fibrosus cellsMorphology of hAF cells harvested from degenerated disc tissues. a The scale bar indicates 100 Ī¼m. b The scale bar indicates 50 Ī¼m. Cells were cultured for 20 days. Cells were spindle-shaped and plastic adherent. The doubling time was 63āĀ±ā12 h (range, 52ā78 h)Back to article page