blood and hemopoietic system 124 human 56 human cell 48 Support, Non-U.S. Gov't 42 Human 40 Male 38 animal experiment 30 rat 30 erythrocyte 28 Animal 26 Humans 26 Rats 26 Erythrocytes 24 Female 24 Kinetics 24 drug efficacy 24 in vitro study 24 nonhuman 24 porphyria 24 intoxication 22 priority journal 22 Porphyrins 20 methodology 20 normal human 20 porphobilinogen synthase 20 Adult 18 Porphyria 18 porphyrin 18 Porphobilinogen Synthase 16 liver 16