In laboratory findings, low haemoglobin (Hb) level (Hb < 10 g/dL in female and Hb < 11 g/dL in male), hyponatremia (<135 mmol/L), and hypoalbuminemia (<3.6 g/dL) were shown in 23.9%, 22.6%, and 35.2% of patients, respectively. This evidence concerns the gene GSTM1 and Hyponatremia.