Real-world Data From the Swiss Lenalidomide in MDS del(5q) (SLIM)—Registry Identify New Chances and Challenges in Lenalidomide Treatment of Patients With MDS del(5q) oleh Axel Rüfer, Hubert Angermann, Rudolf Benz, Nicolas Bonadies, Antonello Calderoni, Nathan Cantoni, Anna Efthymiou, Robert Escher, Geneviève Favre, Dorothea Friess, Andreas Gschwend, Andreas Himmelmann, Andreas Holbro, Peter Keller, Eirini Kouroupi, Thomas Lehmann, Nikolaus Pedarnig, Véronique Rigamonti, Kaveh Samii, Adrian Schmidt, Hans-Peter Schäfer, Roland Sperb, Georg Stüssi, Annette Winkler, Reinhard Zenhäusern, Jeroen S. Goede, on behalf of the SLIM-Registry Investigators*