526 Removal of soluble tumor necrosis factors receptors 1/2 in patients with metastatic solid tumors using immune apheresis - Ronnie Shapira-Frommer; Robert Segal; Gal Markel; Nethanel Asher; Ayala Tamir; Hagit Harati; Ronen Stoff; Shirly Grynberg; Adam Ostrowski; Lawrence Florin (Journal for ImmunoTherapy of Cancer, 2021)