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