GSTM1 and infection: In the first study, Naidech et al. [85] randomized 44 SAH patients at high risk of vasospasm to receive RBCT for a target Hb of 10 or 11.5 g/dl; more transfusions were observed in the high Hb threshold group than in the other, while safety endpoints (e.g., infections and thromboembolic events) were not different between the groups.