nonhuman article 114 aminolevulinic acid 92 controlled study 90 Aminolevulinic Acid 80 priority journal 76 Animals 64 animal experiment 62 Mice 58 mouse 58 Porphyrins 56 animal tissue 56 Male 54 male 48 porphyrin 48 animal model 44 5 aminolevulinate synthase 38 Liver 36 animal cell 36 enzyme activity 36 Support, Non-U.S. Gov't 34 heme 34 Heme 32 rat 32 5-Aminolevulinate Synthetase 30 Animal 30 Photosensitizing Agents 28 liver 28 Animalia 26 Photodynamic therapy 26