GSTM1 and acute kidney injury: An older age [4], female sex [4, 5], high serum creatinine level [5-7], acute kidney injury (AKI)[5, 8], low platelet count [8], low Hb level [2, 6, 8], prolonged active partial thromboplastin time (APTT) [2, 4], and frequent needle passes [7, 9] have been reported as risk factors for bleeding events due to a PKB.