controlled study nonhuman 228 article 214 Animals 164 animal experiment 162 priority journal 150 animal tissue 142 male 142 Liver 136 Male 110 enzyme activity 104 animal model 102 female 90 rat 86 Mice 84 liver 84 mouse 84 Female 82 animal cell 82 Rats 68 Animalia 60 5 aminolevulinate synthase 50 human 44 metabolism 44 oxidative stress 44 5-Aminolevulinate Synthetase 42 Article 40 Humans 40 protein expression 40 unclassified drug 40