Gratwohl A, Schwendener A, Baldomero H, Gratwohl M, Apperley J, Niederwieser D, Frauendorfer K. Changes in the use of hematopoietic stem cell transplantation: a model for diffusion of medical technology. Haematologica 2010; 95(4):637-643; https://doi.org/10.3324/haematol.2009.015586.