Several leading cardiologists are questioning new guidelines (and an online “calculator”) that could lead to millions of additional people mistakenly believing that they should be on statin drugs. From a past president of the American College of Cardiology: “It’s stunning. We need a pause to further evaluate this approach before it is implemented on a widespread basis.”

+ The WSJ’s Laura Landro on the biggest mistakes doctors make: Misdiagnoses.

+ Health care apps that doctors use.