title: On the level.
authors.affiliation: Division of Emergency Medicine, Washington University School of Medicine, Campus Box 8072, 660 S. Euclid Avenue, Saint Louis, MO 63110, USA. mullinsm@wusm.wustl.edu
authors.forename: Michael E
authors.initials: ME
authors.lastname: Mullins
mesh_terms: D035081:Editorial Policies; D009626:Terminology as Topic; D014116:Toxicology / Q000379:methods*; D015262:Xenobiotics / Q000032:analysis*
chemical_list: D015262:Xenobiotics