A vertebral disc prosthesis, a method of implanting a prosthesis and a deployment device is provided. Also provided are methods of treating subjects with mild to moderate active ulcerative colitis, including ulcerative proctitis and proctosigmoiditis. The device is provided with extraction elements for extracting the duct from the body of the subject in whom it is inserted. Each lift includes a fluid cylinder and shaft mounted to an arm. The transmission portion is coupled to the movable portion, and transmits the movable portion to move in the first direction and the second direction in response to a force exerted thereon. A first engine calibration parameter set is provided from the engine calibration database of the host computer to the enginecalibration development computer, and therein at least one parameter of the first engine calibration parameter set is modified to form a second engine calibration parameter set.