id	keyword
dpc-3509	d t
dpc-3509	l -p
dpc-3509	pdt
dpc-3509	-p d
dpc-3509	d l
dpc-3509	dermatol
dpc-3509	therapy
dpc-3509	photodynamic
dpc-3509	pmid
dpc-3509	field
dpc-3509	skin
dpc-3509	doi