Percent changes in serum intact parathyroid hormone (iPTH) and albumin-corrected calcium (cCa) during the study period (multiple-dose i.v. injections and follow-up). Etelcalcetide was injected via the venous blood line after dialysis on days 1, 3, 6, 8, 10, 13, 15, 17, 20, 22, 24, and 27 in hemodialysis patients with secondary hyperparathyroidism (SHPT). Blood samples were obtained before each dialysis. Data are expressed as mean ± SD. (a) iPTH levels following drug administration (from day 1 to day 3, and from day 27 to day 29). (b) cCa levels following drug administration (from day 1 to day 3, and from day 27 to day 29).