Prednisone Terminated Phase N/A Trials for Chronic Granulomatous Disease (CGD) / Bruton's agammaglobulinemia / Severe Combined Immunodeficiency / Chediak-Higashi Syndrome / Common Variable Immunodeficiency / X-Linked Lymphoproliferative Syndrome / Wiskott-Aldrich Syndrome (WAS) / Familial Erythrophagocytic Lymphohistiocytosis / Graft Versus Host Disease (GVHD) / Immunologic Deficiency Syndromes / Lymphohistiocytosis, Hemophagocytic / X-Linked Hyper IgM Syndrome / Virus-Associated Hemophagocytic Syndrome / Leukocyte Adhesion Deficiency Syndrome Treatment