While it is hornbook law that a hospital will be vicariously liable for the acts of its employees within the scope of their employment, a more difficult question arises when malpractice is claimed on the part of a non-employed physician working within a medical facility. Vicarious liability is an exception to the general proposition that limits a defendant's liability to one's own wrongdoing. Mondello v. New York Blood Center, 80 N.Y.2d 219, 227 (1992).