(A) Mean (SD) serum continuous erythropoietin receptor activator (C. E (A) Mean (SD) serum continuous erythropoietin receptor activator (C.E.R.A.) concentration and (B) mean (SD) reticulocyte count after intravenous (IV) and subcutaneous (SC) administration in peritoneal dialysis patients. (A) Mean (SD) serum continuous erythropoietin receptor activator (C.E.R.A.) concentration and (B) mean (SD) reticulocyte count after intravenous (IV) and subcutaneous (SC) administration in peritoneal dialysis patients. Iain C. Macdougall et al. CJASN 2006;1:1211-1215 ©2006 by American Society of Nephrology