Extract data from a PDF file with Tabula
Kirkham et al. 2006 is a prospective 2-year study of 60 patients with rheumatoid arthritis (RA). It shows that “synovial membrane cytokine mRNA expression is predictive of joint damage progression in RA”. The PDF includes a few tables with data on cytokine measurements and correlations with joint damage. Here, we'll use Tabula to extract data from tables in the PDF file. Then we'll make figures with R.