Darbepoetin alfa in the treatment of anemia in renal transplant patients: a single-center report - El Haggan, Wael; Vallet, Lydie; Hurault de Ligny, Bruno; Pujo, Myriam; Corne, Bénédicte; Lobbedez, Thierry; Levaltier, Béatrice; Ryckelynck, Jean Philippe (Transplantation, 2004)