2-[1-Hexyloxyethyl]-2-devinyl pyropheophorbide-a (HPPH) in a nude rat glioma model: implications for photodynamic therapy. - Lobel,J.; MacDonald,I.J.; Ciesielski,M.J.; Barone,T.; Potter,W.R.; Pollina,J. (Lasers Surg Med, 2001)