The invention provides a rodenticide comprising cellulosic material which is non-toxic to humans but which causes rodents to excrete body fat andor adipose tissue. The supervisor is presented with an electronic evaluation form that includes evaluation items that are answered by the supervisor selecting one of a plurality of options. The invention also provides methods of using the cells of the invention, for example in methods to promote neuroregeneration and bone formation. Steps on the conductor plug can be reduced. The water absorbing ring includes deformable material and water absorbent, such that the water absorbing ring expands by absorbing water and contacts the inner and outer peripheral surfaces.