Surgical instruments for prolapse repair are disclosed. The dosage form provides a delay of at least one hour between the initial release of active ingredient contained in said first core and the initial release of active ingredient contained in said second core after contacting of the dosage form with a liquid medium. At high field strength on the antenna, the voltage is adjusted downwards by increasing the clock frequency for a digital circuit. A suitable lock is provided for selectively locking the clam shell members to each other to prevent a separation of the clam shell members. Turning the elevator bolts adjusts the height of the tracks above the building floor. In particular embodiments, the first and second couplers can have different configurations so as to be compatible with aircraft having different refueling arrangements.