P4–402: Exploring associations between serum 25‐hydroxyvitamin D and domain‐specific cognitive performance using Restricted Cubic Splines: A cross‐sectional study in Dutch elderly. (1st July 2013) - Brouwer‐Brolsma, Elske; Dhonuskhe‐Rutten, Rosalie; van Wijngaarden, Janneke; van der Zwaluw, Nikita; in 't Veld, Paulette; Kessels, Roy; Feskens, Edith; ,; van Dijk, Suzanne; de Groot, Lisette