Antibodies, Monoclonal, Humanized/pharmacokinetics; Antibodies, Monoclonal/pharmacokinetics; Antineoplastic Agents, Immunological/pharmacokinetics; Multiple Myeloma/drug therapy; Aged; Antibodies, Monoclonal/pharmacology; Antibodies, Monoclonal, Humanized/administration & dosage; Antibodies, Monoclonal, Humanized/pharmacology; Antineoplastic Agents, Hormonal/administration & dosage; Antineoplastic Agents, Hormonal/therapeutic use; Antineoplastic Agents, Immunological/administration & dosage; Antineoplastic Agents, Immunological/pharmacology; Antineoplastic Combined Chemotherapy Protocols/therapeutic use; Body Weight/drug effects; Case-Control Studies; Clinical Trials as Topic; Dexamethasone/administration & dosage; Dexamethasone/therapeutic use; Drug Interactions; Female; Histocompatibility Antigens Class I/drug effects; Histocompatibility Antigens Class I/metabolism; Humans; Male; Multiple Myeloma/immunology; Myeloma Proteins/drug effects; Neoplasm Recurrence, Local/drug therapy; Pharmaceutical Preparations; Receptors, Fc/drug effects; Receptors, Fc/metabolism; Recurrence; Thalidomide/administration & dosage; Thalidomide/analogs & derivatives; Thalidomide/therapeutic use; Time Factors; beta 2-Microglobulin/drug effects; beta 2-Microglobulin/metabolism