photosensitizing agent article 46 Photosensitizing Agents 40 priority journal 30 Animals 26 chemistry 26 unclassified drug 26 controlled study 24 Porphyrins 20 animal 20 Mice 18 mouse 18 nonhuman 18 photodynamic therapy 18 porphyrin 18 metabolism 16 photochemistry 16 singlet oxygen 16 Aminolevulinic Acid 14 Photochemotherapy 14 aminolevulinic acid 14 animal experiment 14 animal model 14 chemical structure 14 light 14 Male 12 animal tissue 12 drug effect 12 human 12 male 12