Shannen Doherty’s doctor and close friend has opened up about the late star’s final moments. Dr. Lawrence D. Piro, who assisted the Charmed and Beverly Hills, 90210 alum during her grueling battle with breast cancer, was in the room with her family, friends, and beloved dog Bowie as she passed, RadarOnline.com can reveal. As he recalled: “In the last few hours, she was in a place where she was very comfortable and sleeping and transitioning, and she was surrounded by some of her very close friends.” “The room was surrounded by a select group of friends that were giving her a lot of care and su…