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