Summary: Featuring articles on a wearable cardioverter-defibrillator after myocardial infarction, superwarfarin contamination of cannabinoid products, restrictive or liberal transfusion for cardiac surgery, persistence of Zika virus in body fluids, recovery of over-ground walking after spinal injury, and RNA biology and parity at the bench; a review article on alcohol use in patients with chronic liver disease; a case report of a woman with chronic abdominal pain; and Perspective articles on how to stop mass shootings, on mental health services for medical students, on outbreaks in a rapidly changing Central Africa, and on murmurs of politics and economics.
