Should "come about" be "comes about"? Because the subject is "the disparity"

Context:

These findings arise from a deeper understanding of circadian rhythms, better known as the body clock, and the genes associated with regulating this daily cycle every 24 hours.

It is during adolescence when the disparity between inherent circadian rhythms and the typical working day come about. Circadian rhythms determine our optimum hours of work and concentration, and in adolescence these shift almost 3 hours later. These genetic changes in sleeping patterns were used to determine start times that are designed to optimize learning and health.

More:
http://www.sciencedaily.com/releases/2015/09/150904082514.htm