A phase change memory device and a method of forming the same include a conductive pattern formed on a substrate. The identification information displaying controller displays a plurality of identification information that is read from a storage medium and is indicative of respective ones of a plurality of different operating conditions. A representative method for reducing muscle and joint soreness includes administering the chemical formulation to a host. An offset voltage is determined by comparing the output voltage to the set voltage. The second gear member is coupled for rotation with the lower support arm and has an articulation surface adjacent a surface of the lower support arm.