An image forming apparatus comprises a driving roller and at least one spherical driven roller. Once the DB command templates are identified, they are copied to a memory. Additionally, various chemotherapeutic agent and radiation therapies are described which may be advantageously used in conjunction with electrical therapy to ameliorate cancer. A game server can attribute one or more in-game benefits to a current player based on the in-game profile associated with other players who are identified in a game social network as friends of the current player. According to the present invention, the damage of the vehicle body can be quantitatively understood and a proper method of repairing the vehicle can be recognized.