title: Usability of repeated liver biopsies for estimation of drug residue in calf liver.
mesh_terms: D000818:Animals; D001707:Biopsy, Needle / Q000379:methods / Q000662:veterinary; D007700:Kinetics; D008099:Liver / Q000378:metabolism*; D010400:Penicillin G / Q000378:metabolism*
chemical_list: D010400:Penicillin G