Photodynamic therapy is a relatively new modality for therapy of neoplastic disease and also shows promise in other therapeutic settings. While PDT research has proceeded without any special programs being put in place, further development depends on support- ing clinical data and perhaps some new approaches with regard to re- search support.
David Kessel, David Kessel,
"Photodynamic therapy: priorities for 1990", Proc. SPIE 10306, Future Directions and Applications in Photodynamic Therapy, 1030604 (21 January 1990); doi: 10.1117/12.2283666; https://doi.org/10.1117/12.2283666