Lenalidomide-dexamethasone versus observation in high-risk smoldering myeloma after 12 years of median follow-up time: A randomized, open-label study

María‐Victoria Mateos, Miguel-Teodoro Hernández, Carlos Salvador, Javier de la Rubia, Felipe de Arriba, Lucía López‐Corral, Laura Rosiñol, Bruno Paiva, Luis Palomera, Joan Bargay, Albert Oriol, Felipe Prósper, Javier López, José-María Arguiñano, Joan Bladé, Juan José Lahuerta, Jesús F. San Miguel