A bed having a frame and a deck is disclosed. A plurality of fittings may be integrally formed on a surface of each arm. In a preferred aspect, a substituted pyrrolidine compound is administered to a subject in coordination with a phosphodiesterase inhibitor compound. When the remaining battery-level shifts over a boundary battery-level positioned between grades adjacent to each other, the battery selector selects one of the plural batteries, the remaining battery-level of which is greatest. The gain-adjusted G signal is input into a paper fingerprint extracting section via a shading correcting section.