Letters to the EditorUse of Age-Adjusted Serum Creatinine in a Vancomycin Pharmacokinetic Model Decreases Predictive Performance in Elderly PatientsTong, Dominic M. H. PhD; Hughes, Jasmine H. PhD; Keizer, Ron J. PharmD, PhDAuthor Information InsightRX, San Francisco, California D. M. H. Tong., J. H. Hughes., and R. J. Keizer are employees and stockholders of InsightRX. De-identified data were used in this work. Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Web site (www.drug-monitoring.com). Therapeutic Drug Monitoring: February 2021 - Volume 43 - Issue 1 - p 139-140 doi: 10.1097/FTD.0000000000000819 Buy SDC Metrics Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.