Methods of treating tumors, preventing restenosis, and treating hyperplasias, corneal haze, and cataracts by administering to an animal a mutated cyclin G1 protein. The cam follower has a housing and a cam roller. Also provided is a return force component that provides a variable, tailored return force to the SMA component. When it is determined that the executing conditions for the degradation determination are satisfied, a change in setting of the target cam phase, which is to be executed in dependence on operating conditions of the engine, is restricted. An elementnode is selected and its attributes are identified. The zoom lens further satisfies given conditions.