A method of controlling an Automatic Guided Vehicle system having a plurality of AGVs includes setting a moving path with task times of all the AGVs taken into account, and controlling the AGVs according to the set moving path. The bone fixture includes a self-drilling threaded body that is configured to be inserted into a recipient’s bone. The impeller vanes define air paths that are open to the outlet passage. Also, since the cooling passage is arranged in the vicinity of the light source device, the light source device can also efficiently be cooled. The internal open space is configured to allow substantially uniform thermal expansion of the body during curing. Administration of osteoprotegerin in a pharmaceutical composition prevents and treats atherosclerosis and associated cardiovascular diseases.