Letter to the EditorMeasuring Plasma Concentrations of Ribavirin: First Report From a Quality Control ProgramSmolders, Elise Joëlle MSc*; Kan, Rodney MSc†; de Kanter, Clara Tresia Marcus Maria PharmD, PhD‡; van Luin, Matthijs PharmD, PhD†,§; Aarnoutse, Rob Edward PharmD, PhD*,†; Touw, Daan Johannes PharmD, PhD†,¶; Burger, David Marinus PharmD, PhD* Author Information *Department of Pharmacy, Radboud Institute for Health Sciences, Radboud university medical center, Nijmegen, the Netherlands †Dutch Association for Quality Assessment in Therapeutic Drug Monitoring and Clinical Toxicology (KKGT), The Hague, the Netherlands ‡Department of Pharmacy, University Medical Center Utrecht, Utrecht, the Netherlands §Department of Clinical Pharmacy, Rijnstate Hospital, Arnhem, the Netherlands ¶Department for Clinical Pharmacy and Pharmacology, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands D. J. Touw is on the advisory board of Sanquin and received a research grant from ZONMW. D. M. Burger is on advisory boards of Abbvie, BMS, Gilead, Janssen, ViiV Healthcare, and Merck. He received sponsorship and research grants from BMS, Janssen, ViiV Healthcare, and Merck. The remaining authors declare no conflict of interest. Participating laboratories pay a subscribing fee for their participation in the program. Therapeutic Drug Monitoring: October 2016 - Volume 38 - Issue 5 - p 646-647 doi: 10.1097/FTD.0000000000000319 Buy Metrics Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved.