A vehicle door has a supporting annular frame 12-19 of high strength steel close to the outer panel and the frame is stamped from a plane sheet so that a side impact guard beam is formed in the same stamping operation. The method includes increasing a flow of gases through the passage between the crankcase and the intake manifold when a temperature of the gases is below a predetermined temperature. A calculator is responsive to a measure of an amount of the therapeutic output actually delivered to the patient for determining a parameter representative of a time at which the therapeutic output delivery module of the implantable medical device should be replenished with the therapeutic substance based at least in part upon the amount obtained from the measure. The locking set is mounted on the shaft. Angled transition sections may be provided between each fixation member and the optic periphery.