liposome priority journal 42 article 36 Liposomes 34 nonhuman 28 controlled study 26 Animals 24 drug delivery system 18 unclassified drug 18 Mice 14 Photochemotherapy 14 chemistry 14 human 14 photodynamic therapy 14 Male 12 Photosensitizing Agents 12 Porphyrins 12 animal cell 12 animal experiment 12 mouse 12 Aminolevulinic Acid 10 Article 10 Calorimetry, Differential Scanning 10 Cell Membrane 10 Drug Delivery Systems 10 Humans 10 Mice, Inbred BALB C 10 aminolevulinic acid 10 animal tissue 10 male 10