The benefit of beta-blockers after myocardial infarction in patients with a preserved left ventricular ejection fraction (LVEF) is unclear. We conducted a meta-analysis at the individual-patient level ...

Objective To evaluate systematic reviews of randomised controlled trials (RCTs) on the effects of exercise on general cognition, memory and executive function across all populations and ages. Methods ...

Sometimes, psychological studies on the same topic show different results. To know what the evidence looks like when the data from all studies on a topic are combined, psychologists often conduct ...