After a few quiet weeks with no announcements, the Physician Medical Group sector got busy. Sheridan Healthcare, a subsidiary of AmSurg Corp. (NASDAQ: AMSG), acquired Radiology Associates of Hollywood (Florida), which handles radiology services for 12 hospitals and other facilities in Broward County. US Anesthesia Partners picked up another Texas-based practice, Excel Anesthesia, P.A., which it will merge into Pinnacle Anesthesia Consultants, one of its founding partners. Then Partners HealthCare System, which was spurned by the Massachusetts Attorney General in its bid for South Shore Hospital, turned around and angered the AG once again by acquiring Harbor Medical Associates in South Weymouth, a 70-physician group with offices in eight suburban Boston locations. The MA AG doesn’t like the deal, but has no legal means to oppose it.