Fig. 3
From: Long-term results of the M2A-38-mm metal-on-metal articulation
Box plots showing the whole blood levels of metal ions for cobalt (Co) and chromium (Cr) relative to the groups with monolateral MoM, bilateral MoM or monolaterale MoM with another hip or knee prosthesis. The boxes represent the median and interquartile range (IQR) and whiskers denote the range of data excluding outliers. Co and Cr levels were significantly higher in bilateral MoM (p < 0.01, Kruskal–Wallis)