The presented data from six published phase 2 clinical trials indicate that roxadustat was able, on the one hand, to increase the level of Hb, and, on the other hand, to maintain the level of Hb at an elevated level, both in patients not on dialysis and in patients undergoing dialysis with CKD [8,10,13,15,21]. The gene discussed is GSTM1; the disease is chronic kidney disease.