Topical administration is generally preferred for {TAIL ~ skin related diseases}, and systematic treatment preferred for cancerous or pre cancerous conditions, although {HEAD ~ other modes} of delivery are contemplated 
Topical administration is generally preferred for { TAIL ~ skin related diseases } , and systematic treatment preferred for cancerous or pre cancerous conditions , although { HEAD ~ other modes } of delivery are contemplated
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH