title: Reply to Verhaeghe et al.
authors.affiliation: Tuberculosis Center Beatrixoord, Department of Pulmonary Diseases and Tuberculosis.
authors.forename: Onno W
authors.initials: OW
authors.lastname: Akkerman
authors.affiliation: Department of Hospital and Clinical Pharmacy.
authors.forename: Kai
authors.initials: K
authors.lastname: van Hateren
authors.affiliation: Department of Hospital and Clinical Pharmacy.
authors.forename: Remco A
authors.initials: RA
authors.lastname: Koster
authors.affiliation: Department of Neurology.
authors.forename: Gert-Jan R
authors.initials: GJ
authors.lastname: Luijckx
authors.affiliation: Department of Pulmonary Diseases and Tuberculosis Department of Internal Medicine, University of Groningen, University Medical Center Groningen, The Netherlands.
authors.forename: Tjip S
authors.initials: TS
authors.lastname: van der Werf
authors.affiliation: Department of Hospital and Clinical Pharmacy.
authors.forename: Jan-Willem C
authors.initials: JW
authors.lastname: Alffenaar