Importance Syncope can result from a reduction in cardiac output from serious cardiac
conditions, such as arrhythmias or structural heart disease (cardiac syncope), or other causes, …

Objectives Emergency department (ED) patients with unexplained syncope are at risk of
experiencing an adverse event within 30 days. Our objective was to systematically review the …

Background Physicians' warnings to patients who are potentially unfit to drive are a medical
intervention intended to prevent trauma from motor vehicle crashes. We assessed the …

Background Because of a belief that the use of cellular telephones while driving may cause
collisions, several countries have restricted their use in motor vehicles, and others are …

Climate change causes and exacerbates disease, creates and worsens health disparities,
disrupts health care delivery, and imposes a significant disease burden in the US and globally…

Introduction Randomized trials recruit diverse patients, including some individuals who may
be unresponsive to the treatment. Here we follow up on prior conceptual advances and …

Background Patients can have several illnesses concurrently, yet some of these diseases
may be neglected if one problem consumes attention. We conducted a population-based …

We investigated decisions involving multiple independent uncertain prospects. At the
extremes, a decision maker may either consider each prospect as a separate event (segregation) …

… assistance; Bill Redelmeier for computer programming; and Chaim Bell, David Juurlink,
Gabor Kandel, Michael Schull, Matthew Stanbrook, John-Paul Szalai, and Robert Tibshirani for …

We present definitions for real and quaternionic second-order free cumulants, functions whose
collective vanshing when applied to elements from different subalgebras is equivalent to …