Extracorporeal photopheresis in 62 patients with acute and chronic GVHD: Results of treatment with the COBE Spectra System. - Hautmann, A H; Wolff, D; Hahn, J; Edinger, M; Schirmer, N; Ammer, J; Holler, B; Landfried, K; Hautmann, M G; Ahrens, N; Ugocsai, P; Andreesen, R; et al. (Bone Marrow Transplantation, 2013)