Correlation between caveolin-1 and p16INK4a gene expression in degenerate nucleus pulposus samples. Caveolin-1 and p16INK4a gene expression (copy number per 100 ng cDNA normalised to 18S) analysed by quantitative real-time reverse transcription-polymerase chain reaction. Non-parametric linear regression analysis (P = 0.02; R2 = 0.4725).
Heathfield et al. Arthritis Research & Therapy 2008 10:R87 doi:10.1186/ar2468