Razenberg, L. G. E. M.; Creemers, G.-J.; Beerepoot, L. V.; Vos, A. H.; van de Wouw, A. J.; Maas, H. A. A. M.; Lemmens, V. E. P. P. Age-Related Systemic Treatment and Survival of Patients With Metachronous Metastases from Colorectal Cancer. AO 2016, 55, 1443-1449.