<qa>  How many mL of blood will be sent for platelets function assessment?At the beginning of the study, blood will be taken for complete blood count including platelets count and mean platelets volume, serum electrolytes, albumin, blood lipids, KtV, troponin and two 5 ml aliquots from each blood collection will be separated and stored at -70co until analyzed for oxidative stress, homocysteine and highly sensitive CRP will be performed. Five mL of blood will be sent for platelets function assessment described below. 