A law firm landed four favorable defense verdicts in an 12-day span, protecting two local hospitals and two physicians in different medical-malpractice cases in Cook and McHenry counties. Attorneys from Swanson, Martin & Bell LLP said they knew they would have a busy few weeks as trial schedules finalized in October, but they didn’t expect so many cases to end in such rapid order. “It was serendipitous,” said Joseph P. Switzer, a partner who handled one of the cases. The first verdict came on …