Ketamine Completed Phase 3 Trials for Neurologic toxicity / Chronic Myeloproliferative Disorders / Myelodysplastic Syndromes / Unspecified Adult Solid Tumor, Protocol Specific / Myelodysplastic/Myeloproliferative Neoplasms / Pain NOS / Multiple Myeloma and Plasma Cell Neoplasm / Leukemias / Lymphoproliferative Disorders / Malignant Lymphomas Supportive Care