Institute for Cancer Research mouse 15 mouse 15 Animals 14 Mice, Inbred ICR 14 animal 14 male 13 Male 12 Mice 11 nonhuman 11 Article 10 controlled study 10 Oncology 9 animal experiment 9 metabolism 8 unclassified drug 8 animal model 7 chemistry 7 Female 6 female 6 human 6 isolation and purification 6 Analgesics 5 Disease Models, Animal 5 Plant Extracts 5 Plant Leaves 5 analgesic agent 5 disease model 5 opiate receptor 5 plant extract 5 plant leaf 5