buy cialis generic Thus, various excellent reviews have been dedicated to the role of platelets in cancer metastasis in the last years, discussing the contribution of adhesion receptors like P selectin, or integrin О± IIb ОІ III, platelet activating receptors such as P 2 Y 12 or protease activated receptor 1 PAR 1, or platelet derived growth factors and chemokines in detail 7, 8, 9, 10