Study of 207 Pediatric pts treated w/ Rituxan (for Rheum, Cancer, CNS, Renal dz) and 40% developed hypogammaglobulinemia post-RTX; hypo-IgG Pre-RTX 28.7% to Post RTX 42.6%, p=0.009; low IgG levels had higher risk of serious infx (OR 2.3) https://t.co/b91rPYgVV2