article nonhuman 192 controlled study 180 cytotoxicity 166 unclassified drug 152 Animals 128 animal cell 122 priority journal 122 human 114 human cell 100 Humans 98 antiviral activity 80 mouse 66 in vitro study 64 drug cytotoxicity 62 Antiviral Agents 58 Mice 58 drug structure 54 Cercopithecus aethiops 50 Vero Cells 50 apoptosis 44 drug isolation 44 Cell Survival 40 Cell Line 38 Cell Line, Tumor 38 Vero cell 38 antivirus agent 38 Herpes simplex virus 1 36 concentration response 36 plant extract 36