Cell doubling rates (in days) during cell culture passages for each patient. The cell doubling rate was measured by counting the cells. The day, the cell numbers were doubled after passaging of the cells was noted for each passage. The tendency shows a constant doubling rate in early passages, which increases during the cultivation of the cells. p, passage.
Neumann et al. Arthritis Research & Therapy 2010 12:R83 doi:10.1186/ar3010