Rats, Wistar 233 rat 228 Rats 224 Animals 208 article 208 nonhuman 208 controlled study 178 animal experiment 166 priority journal 140 Male 122 male 114 animal tissue 112 Female 102 female 90 animal model 78 Wistar rat 64 animal 62 animal cell 60 enzyme activity 58 unclassified drug 48 Time Factors 44 metabolism 42 Liver 38 Hexachlorobenzene 36 hexachlorobenzene 36 Hippocampus 32 hippocampus 32 physiology 32 protein expression 32 Animalia 30