The invention discloses differing embodiments of apparatus, and methods for their use, which are designed to aide in lifting bed mattresses and tucking in bed covers. Methods of the invention further include treating an individual with benign prostatic hyperplasia with omega-3 fatty acids as well as methods of screening for compounds that inhibit the proliferation of prostate cancer cells. The used developer storage section communicates with the used developer collecting section. The processing device transmits the order to a placer robot. The surface density of the primary amine functional groups on the very top surface of a substrate can be drastically increased. Such a process for producing a group III nitride semiconductor light emitting device is a process for producing a group III nitride semiconductor light emitting device having a semiconductor layer 20 constituted by laminating an n-type semiconductor layer, a light-emitting layer 15 and a p-type semiconductor layer 16.