An example of a neurostimulation system may include a storage device, a programming control circuit, and a graphical user interface. The negative first lens group includes a first negative meniscus lens element having the convex surface facing toward the object, a second negative meniscus lens element having the convex surface facing toward the object, and a negative third lens element. When an operator sits on the seat, air is forced out of the seat cushion material and into the chamber. A cooling flow path extends from the rear space and into the upper space and lateral side spaces. The first strut is capable of transmitting torque between the first and second coupling members only in a first direction, and the second strut is capable of transmitting torque between the first and second coupling members only in a second direction that is opposite to the first direction. The compositions comprise bifunctional compounds and physiological antioxidants to stabilize the bifunctional compounds.