Bacille Calmette-Guerin (BCG) vaccine for induction of remission in Crohn's disease (protocol stage)

Balance training (proprioceptive training) for patients with rheumatoid arthritis. (protocol stage)

Band ligation versus beta-blockers for primary prevention of bleeding oesophageal varices (protocol stage)

Banding ligation versus beta-blockers for primary prophylaxis in oesophageal varices (protocol stage)

Banked preterm versus banked term human milk to promote growth and development in very low birth weight infants (protocol stage)

Bariatric surgery for non-alcoholic steatohepatitis in obese patients (protocol stage)

Behavioral interventions for increasing the use of condoms in women with HIV (protocol stage)

Behavioral interventions for reducing HIV infection in employees in occupational settings (protocol stage)

Behavioral interventions to reduce the transmission of HIV infection among commercial sex workers and their clients in developed countries (protocol stage)

Behavioral interventions to reduce the transmission of HIV infection among commercial sex workers and their clients in developing countries (protocol stage)

Behavioral therapies for migraine (protocol stage)

Behavioural interventions for children under five years with sleep difficulties (protocol stage)

Benzodiazepines for restless legs syndrome (protocol stage)

Benzodiazepines for the relief of breathlessness in advanced malignant and non-malignant diseases in adults (protocol stage)

Beta blockers for essential tremor (protocol stage)

Beta blockers for preventing stroke recurrence (protocol stage)

Beta blockers for stable angina (protocol stage)

Beta-2 agonists for exercise induced asthma (protocol stage)

Beta-adrenergic blockers for perioperative cardiac risk reduction in patients undergoing vascular surgery (protocol stage)

Beta-blocker plus nitrates for secondary prevention of variceal bleeding (protocol stage)

Beta-blockers alone or with endoscopic therapy for prevention of variceal rebleeding in portal hypertension (protocol stage)

Beta-blockers for heart failure (protocol stage)

Beta-blockers for mitral stenosis (protocol stage)

Beta-blockers for myocardial infarction (protocol stage)

Beta-blockers for unstable angina (protocol stage)

Bibliotherapy for sexual dysfunction (protocol stage)

Bicarbonate versus lactate solutions for acute haemodialysis (protocol stage)

Bicarbonate versus lactate solutions for acute peritoneal dialysis (protocol stage)

Bilateral versus single internal mammary artery bypass grafts for coronary arterial atherosclerosis (protocol stage)

Biocompatible dialysis fluids for peritoneal dialysis (protocol stage)

Biodegradable anastomotic ring for gastrointestinal anastomosis (protocol stage)

Biofeedback for pain during labour (protocol stage)

Biologics for chronic plaque psoriasis (protocol stage)

Biphasic versus monophasic waveforms for transthoracic defibrillation in out-of-hospital cardiac arrest (protocol stage)

Bisphosphonates for prevention of bone loss in women with early breast cancer (protocol stage)

Bisphosphonates in early prostate cancer (protocol stage)

Black cohosh (Cimicifuga spp.) for menopausal symptoms (protocol stage)

Blinded versus unblinded assessments of risk-of-bias in studies included in a systematic review (protocol stage)

Blood pressure control for diabetic retinopathy (protocol stage)

Blood pressure increasing effect of sibutramine in obese patients (protocol stage)

Blood pressure lowering efficacy of beta-1 selective beta blockers for primary hypertension (protocol stage)

Blood pressure lowering efficacy of beta-blockers as second-line therapy for primary hypertension (protocol stage)

Blood pressure lowering efficacy of calcium channel blockers for primary hypertension (protocol stage)

Blood pressure lowering efficacy of calcium-channel blockers as second-line therapy for primary hypertension (protocol stage)

Blood pressure lowering efficacy of drugs inhibiting the renin-angiotensin system as second-line therapy for primary hypertension (protocol stage)

Blood pressure lowering efficacy of dual alpha and beta blockers for primary hypertension (protocol stage)

Blood pressure lowering efficacy of non-selective beta blockers for primary hypertension (protocol stage)

Blood pressure lowering efficacy of partial agonist beta blockers for primary hypertension (protocol stage)

Blood pressure lowering efficacy of potassium-sparing diuretics (that block the epithelial sodium channel) for primary hypertension (protocol stage)

Blood pressure lowering efficacy of thiazide diuretics for primary hypertension (protocol stage)

Blood substitutes for avoiding allogeneic blood transfusion (protocol stage)

Blood transfusions for treating acute chest syndrome in people with sickle cell disease (protocol stage)

Blood-pressure-lowering treatment for preventing recurrent stroke, major vascular events, and dementia in patients with a history of stroke or transient ischaemic attacks (protocol stage)

Body position for spontaneously breathing preterm infants with apnoea (protocol stage)

Bone morphogenetic protein (BMP) for fracture healing in adults (protocol stage)

Boosted protease inhibitor (PI) monotherapy for treating HIV/AIDS (protocol stage)

Botulinum A toxin for focal hand dystonia (protocol stage)

Botulinum toxin A for the prevention of hip dislocation in cerebral palsy (protocol stage)

Botulinum toxin for adult spasticity after stroke or non-progressive brain lesion (protocol stage)

Botulinum toxin for myofascial pain syndromes in adults (protocol stage)

Botulinum toxin for the treatment of chronic idiopathic constipation (protocol stage)

Botulinum toxin type A and casting versus botulinum toxin type A or casting in treating equinus gait of children with cerebral palsy (protocol stage)

Botulinum toxin type A formulations in focal dystonias (protocol stage)

Bowel preparation for colonoscopy (protocol stage)

Braces for idiopathic scoliosis in adolescents (protocol stage)

Buprenorphine for cancer pain (protocol stage)

Bupropion for depression (protocol stage)