Bilateral Graph

http://www.healio.com/orthopedics/hip/journals/ortho/%7B0b0108a2-3a34-4788-825b-e6533f73c62f%7D/one-stage-bilateral-total-joint-arthroplasty-a-prospective-comparative-study-of-total-hip-and-total-knee-replacement

A bilateral graph is a chart that  shows two or more sets of data either side by side or stacked up on top of each other, sometimes seen as histograms or line graphs.  Above is a bilateral bar graph that shows complications patients in different age groups had with total hip or total knee replacements.