Soluble CD137 as a dynamic biomarker to monitor agonist CD137 immunotherapies ============================================================================= * Javier Glez-Vaz * Arantza Azpilikueta * Irene Olivera * Assunta Cirella * Alvaro Teijeira * Maria C Ochoa * Maite Alvarez * IƱaki Eguren-Santamaria * Carlos Luri-Rey * Maria E Rodriguez-Ruiz * Xinxin Nie * Lieping Chen * Sonia Guedan * Miguel F Sanmamed * Jose Luis Perez Gracia * Ignacio Melero