My lede:

Patients are especially vulnerable to harmful medical mix-ups when they leave the hospital. Doctors and hospitals have devoted much attention in recent years to improving the process of reconciling the medications patients were taking before they arrived with what they should take after discharge.

New research highlights another continuity-of-care challenge: following up on tests ordered in the hospital. Four in 10 patients are discharged with test results pending, and about 9% of those tests should lead to a change in the patient’s care.

But how can primary care doctors check up on these tests if they do not know about them?

The whole shebang.