Prednisone Recruiting Phase 2 Trials for Stage IV Anaplastic Large Cell Lymphoma / Peripheral T-Cell Lymphoma, Not Otherwise Specified / Adult T-Cell Leukemia/Lymphoma / CD30-Positive Neoplastic Cells Present / Angioimmunoblastic T-Cell Lymphoma / Enteropathy-Associated T-Cell Lymphoma / Anaplastic Large Cell Lymphoma, ALK-Negative / Mature T-Cell and NK-Cell Non-Hodgkin Lymphoma / Stage III Anaplastic Large Cell Lymphoma / Anaplastic Large Cell Lymphoma, ALK-Positive / Hepatosplenic T-Cell Lymphoma Treatment