Is it safe to switch from intravenous immunoglobulin to subcutaneous immunoglobulin in patients with common variable immunodeficiency and autoimmune thrombocytopenia? by Scheuerlein, P, Pietsch, L, Camacho-Ordonez, N, Reiser, V, Patel, S, Burns, S, Warnatz, K, Grimbacher, B