{HEAD ~ The time release patch} 2, wherein said preservative is {TAIL ~ a bacteriocidal agent} or bacteriostatic agent 
{ HEAD ~ The time release patch } 2 , wherein said preservative is { TAIL ~ a bacteriocidal agent } or bacteriostatic agent
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH