actual paper
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0081237#pone-0081237-g004
See the discussion section
actual paper
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0081237#pone-0081237-g004
See the discussion section
Data in Figure 4 looks too sparse to be convincing.