The Pfizer COVID-19 vaccine has proven 94 percent effective in a study involving 1.2 million people in Israel, the first peer-reviewed real world research confirming the […]
Instrumental variable approachIn our study (doi:10.1136/bmj.n156), we used a novel set of methods to combine evidence from previously reported randomized trials that share a common biological…
AbstractObjectiveTo evaluate trials of drugs that target amyloid to determine whether reductions in amyloid levels are likely to improve cognition.DesignInstrumental variable meta-analysis.Setting14…