The Ubiquitin Modifying Enzyme A20 Restricts B Cell Survival and Prevents Autoimmunity IMMUNITY Tavares, R. M., Turer, E. E., Liu, C. L., Advincula, R., Scapini, P., Rhee, L., Barrera, J., Lowel, C. A., Utz, P. J., Malynn, B. A., Ma, A. 2010; 33 (2): 181-191