P1.09 HERITABILITY OF RETINAL MICROCIRCULATION IN FLEMISH FAMILIES - Y.-P. Liu; Y. Jin; L. Thijs; T. Kuznetsova; K. Asayama; Y.-M. Gu; M. Bochud; P. Verhamme; H. Struijker-Boudier; J.A. Staessen (Artery Research, 2012)