Researchers sketched a vivid line Friday linking the dollars spent by drugmakers to woo doctors around the country to a vast opioid epidemic that has led to tens of thousands of deaths. The study, published in JAMA Network Open, looked at county-specific federal data and found that the more opioid-related marketing dollars were spent in a county, the higher the rates of doctors who prescribed those drugs and, ultimately, the more overdose deaths occurred in that county. (Victoria Knight, Kaiser Health News)