B Cell Acute Lymphoblastic Leukemia Bacteria Bacterial Infection Bacterium Baraclude Bardet-Beidl Syndrome Bare-Metal Stents Bariatric Surgery Baricitinib Barium Enema Barrett's Esophagus Basal Cell Carcinoma Bazedoxifene B-Cell Lymphoma Bcg Vaccination Beck Depression Inventory Beclomethasone Beclomethasone Formoterol Behcet's Disease Beleodaq Belinostat Belviq Benazepril Benazepril Amlodipine Benazepril Hydrochlorothiazide Bendamustine Benzene Benzoyl Peroxide Beta-2 Agonist Beta2 Agonists Beta-Amyloid Beta-Amyloid Peptide Beta-Blocker Beta-Blockers Beta-Interferon Beta-Lactam Antibiotics Beta-Thalassemia Betmiga Bevacizumab Bexarotene Bextra Bh3 Mimetic Bh3 Mimetics Bidmc Bilateral Mastectomy Biomarker Bioterrorism Bipolar Depression Bipolar Disorder Birth Defects Bisphenol A Bisphosphonates Black Cohosh Bladder Bladder Cancer Bladder Tumour Blinatumomab Blindness Blood Blood Pressure Blood Vessel Blood Vessel Growth Blood Vessels Blood-Brain Barrier Blosozumab Bmi Index Bmp-6 Bnp Boceprevir Body Dysmorphic Disorder Body Mass Index Body Weight Bone Bone Formation Bone Marrow Stem Cell Transplantation Bone Marrow Transplant Bone Metastases Bone Mineral Density Bordetella Pertussis Bortezomib Botulinium Toxin Botulism Botulism Antitoxin Bradycardia Braf Inhibitor Braf Inhibitors Braf V600 Mutations Brain Brain Cancer Brain Metastases Brca1 Brca1 Gene Mutations Brca2 Brca2 Gene Mutations Breast Breast Cancer Breast Cancer Metastases Breast Cancer Mutation Breast Cancer Prevention Breast Cancer Risk Breast Conservation Cancer Breast-Conserving Surgery Brentuximab Vedotin Breo Ellipta Bretaris Brintellix Bronchiectasis Bronchitis Bronchodilator Bronchodilators Bronchopulmonary Dysplasia Bruton Tyrosine Kinase Bruton Tyrosine Kinase Inhibitor Bruton's Tyrosine Kinase Btk Inhibitor Bulimia Buprenorphine Bupropion Burkitt Lymphoma Busilvex Busulfan Bydureon Byetta Bypass Surgery Bystolic