392. Vancomycin Dosing and Concentrations at a Large UniversityAffiliated County Hospital Gilmer Youn, MD; Emi Minejima, PharmD; Lironn Kraler, BS; Brenda Jones, MD; Michael Neely, MD; School of Medicine, University of Southern California, Los Angeles, CA; School of Pharmacy, University of Southern California, Los Angeles, CA; Division of Pediatric Infectious Diseases, Childrens Hospital Los An...