| http://www.w3.org/ns/prov#value | - Referring to FIG. 2, the valve 42 is preferably a one-way valve or other suitable type or design including a ball valve or any other type or design known to those skilled in the art which remains in a closed position to drug delivery (shown in phantom) wherein the ball 44 seals an opening 46, until the pressure exerted on the ball 44 by the drug delivery forces the ball 44 to move to an open posit
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