Fig. 1From: Cellular pharmacodynamic effects of Pycnogenol® in patients with severe osteoarthritis: a randomized controlled pilot studyHousekeeping gene validation data from five cartilage samples obtained from patients suffering from severe knee osteoarthritis. The genes HPRT-1 and SDHA were identified as the most stable ones using the BestKeeper™-software. ACTB was preferred over B2M due to its frequent use in literatureBack to article page