Erratum to: Levels of gastrin-releasing peptide and substance P in synovial fluid and serum correlate with levels of cytokines in rheumatoid arthritis

After publication of our recent article [1], we noticed an error in Table 4, 'Factor analysis on STNFR1 and neuropeptides in serum'.

The value for variable BDNF (0.829; Factor 2) is missing.

The correct table and legend is given here as Table 1 (a corrected version of Table 4 [1]).

Table 1 Factor analysis on sTNFR1 and neuropeptides in serum