Assessment of need for hemostatic evaluation in patients taking valproic acid: A retrospective cross-sectional study. oleh Demi S Post, Arian van der Veer, Olaf E M G Schijns, Sylvia Klinkenberg, Kim Rijkers, G Louis Wagner, Vivianne H J M van Kranen-Mastenbroek, Paul C P H Willems, Paul W M Verhezen, Erik A M Beckers, Floor C J I Heubel-Moenen, Yvonne M C Henskens