In patients older than 55 years with AML in first CR, should we search for a matched unrelated donor when an old sibling donor is available? - Peffault de Latour, R; Labopin, M; Cornelissen, J; Vigouroux, S; Craddock, C; Blaise, D; Huyn, A; Vindelov, L; Maertens, J; Chevallier, P; Fegueux, N; Socié, G; et al. (Bone Marrow Transplantation, 2015)