Babesia microti Antibody, IgM by IFA Bartonella quintana Antibody, IgG by IFA Babesia Species by PCR Bartonella quintana Antibody, IgM by IFA Baclofen Quantitative, Fluid Bartonella Species by PCR Benzodiazepines Detection Beta-2 Microglobulin, CSF Benzodiazepines, Serum or Plasma, Quantitative Beta-2 Microglobulin, Serum or Plasma Benzodiazepines, Urine Screen with Reflex to Quantitation Beta-2 Transferrin Bath Salts Panel, Urine Benzodiazepines, Urine, Quantitative Beta-2-Microglobulin, Urine B-Cell CD20 Expression Benztropine Quantitative, Serum or Plasma Beta-Catenin-1 by Immunohistochemistry B-Cell Clonality Screening (IgH and IgK) by PCR Beryllium Lymphocyte Proliferation, Blood