Collection of Immunology Specimens From Patients With Cancer or Blood Disorders, and Healthy Volunteers

Inclusion Criteria: * All patients known to have cancer, an immune-mediated hematologic diagnosis, or a healthy normal volunteer * Definition of immune-mediated hematologic diagnosis: diagnoses for which immune dysfunction and/or immune system directed therapy (eg. aplastic anemia, autoimmune hemolytic anemia, immune thrombocytopenic purpura \[ITP\], etc.) are involved * Definition of healthy normal volunteer: persons lacking diagnoses of any type of cancer, diabetes, cardiovascular diseases, non-hematologic autoimmune disease (eg. systemic lupus erythematosus \[SLE\], rheumatoid arthritis \[RA\], Crohn's disease) and not taking any immunosuppressive medications * Patients must have been seen in the Norris Hospital and outpatient clinics, or the Los Angeles County (LAC)-University of Southern California (USC) Medical Center or outpatient clinics; healthy volunteers can be recruited without any physician visit appointments since their labs are strictly for clinical research and not for personal health issues unrelated to the project Exclusion Criteria: * Unable to give informed consent to specimen collection * Known human immunodeficiency virus (HIV) positive status * Persons taking any type of immunosuppressive medication are excluded from participating as healthy normal volunteers * Any patient for whom specimen collection is judged to be unsafe (for example, for patients unable to establish venous access)