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