Skip to main content
. 2009 Mar 20;5(3):e1000320. doi: 10.1371/journal.pcbi.1000320

Figure 2. Increased numbers of studies and productivity per study over time.

Figure 2

Error bars show one standard error of the mean. (A) Number of publications per year reporting PPIs increases over time. (B) Mean number of novel PPIs discovered per study increases over time. (C) Number of publications per year reporting GIs increases over time. (D) Mean number of novel GIs discovered per study increases over time. P is two-tailed P-value for the statistical significance of Spearman's rank correlation (ρ).