Humans human 124 Animals 82 article 78 unclassified drug 78 nonhuman 76 priority journal 72 controlled study 58 human cell 52 animal 44 metabolism 44 Article 34 DNA methylation 34 chemistry 34 drug structure 28 review 26 Alternative Splicing 24 alternative RNA splicing 24 drug effect 24 protein expression 24 chromatin structure 22 drug effects 22 drug synthesis 22 messenger RNA 22 physiology 22 animal cell 20 chromatin 20 Cell Line, Tumor 18 Male 18 RNA polymerase II 18