A hydraulic circuit architecture for use in a drive circuit having a hydraulic pump for driving a load is disclosed. The retention section has a diameter which is normally greater than the neck of the bladder but is stretchable on the application of an axial force thereto to reduce its diameter to less than that of the urethra. The present invention also provides a system of creating and maintaining any desired pressure in a body tissue cavity for any desired cavity outflow rate. A shutter 203 which is movable to open and close the lower opening of the tablet reserving member 200 is provided. The dispenser has a removable dispenser panel that is accessed from an access panel foldably attached to the carton. Leukemia inhibitory factor and ciliary neurotrophic factor can optionally be added to enhance the effect of EGF, FGF-1 or TGF\u03b1.