Preclinical aortic atherosclerosis in adolescents with chronic disease by Ververs, FA, Eikendal, ALM, Kofink, D, Nuboer, R, Westenberg, JJM, Hovenkamp, GT, Kemps, JJA, Coenen, ICJ, Daems, JJN, Claus, LR, Ju, Y, Wulffraat, NM, van der Ent, CK, Monaco, C, Boes, M, Leiner, T, Grotenhuis, HB, Schipper, HS