A.C.B. van Orten-Luiten

Vitamin D deficiency as adverse drug reaction? A cross-sectional study in Dutch geriatric outpatients

R. Witkamp, R. Dhonukshe-Rutten, A. Janse, 2016, European Journal of Clinical Pharmacology.

Drug-Nutrition Interactions in Older People

R. Witkamp, A. Janse, A. V. Orten-Luiten, 2017 .

Drug use is associated with lower plasma magnesium levels in geriatric outpatients; possible clinical relevance.

R. Witkamp, E. Verspoor, E. Brouwer-Brolsma, 2019, Clinical nutrition.