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