Distinct Circle of Willis anatomical configurations in healthy preterm born adults: a 3D time-of-flight magnetic resonance angiography study by Greggio, J, Malamateniou, C, Baruteau, KP, Reyes-Aldasoro, CC, Huckstep, OJ, Francis, JM, Williamson, W, Leeson, P, Lewandowski, AJ, Lapidaire, W