b'Scientist Ste Scientist Ste phen Faraone, PhD, explains how certain genetic variants can raise the risk of attention-deficit/hyperactivity disorder phen Faraone, PhD, explains how certain genetic variants can raise the risk of attention-deficit/hyperactivity disorder, or ADHD. Researcher, or ADHD. Researcher Anna Stewart-Ibarra, PhD, and medical student Dan Farrell discuss a malaria outbreak in the wake of the Venezuelan crisis Anna Stewart-Ibarra, PhD, and medical student Dan Farrell discuss a malaria outbreak in the wake of the Venezuelan crisis. Medical ethicist. Medical ethicist Gregory Eastwood, MD, explores end-of-life issues from his new book, "Finishing Our Story." Gregory Eastwood, MD, explores end-of-life issues from his new book, "Finishing Our Story."'