NK cells enhance CAR-T cell antitumor efficacy by enhancing immune/tumor cells cluster formation and improving CAR-T cell fitness ================================================================================================================================= * Mireia Bachiller * Lorena Perez-Amill * Anthony Matthew Battram * Sebastian Ciro Carné * Amer Najjar * Els Verhoeyen * Manel Juan * Alvaro Urbano-Ispizua * Beatriz Martin-Antonio