Columbia subject headings:
Hematoporphyrin--Diagnostic use.
Hematoporphyrin--Therapeutic use.
Lasers--Diagnostic use.
Lasers--Therapeutic use.
Photochemotherapy.
Tumors--Diagnosis.
Tumors--Radiotherapy.
Harvard subject headings:
Hematoporphyrin--Diagnostic use.
Hematoporphyrin--Therapeutic use.
Lasers--Diagnostic use
Lasers--Therapeutic use.
Photochemotherapy.
Tumors--Diagnosis
Tumors--Radiotherapy.
Princeton subject headings: