Table 4. League II PDT clinical classification.

PDT indications	Initial studies	Reproducibility	Publications	Method
Cholangiocarcinoma	++	+/ + +	+	+/ + +
Mesothelioma	++	+	+	+
Brain tumors	++	++	+	+
Urology (prostate, bladder)	+	−+	+	+

Abbreviation: PDT, photodynamic therapy.

− = none; −+ = none or a small number less than 10 publications.