In Mason v. Walsh, 26 Conn. App. 225, 230, 600 A.2d 326 (1991), cert. denied, 221 Conn. 909, 602 A.2d 9 (1992), where the plaintiff was treated by three physicians, a urologist and two anesthesiologists, the issue before this court was which of the three, if any, owed the plaintiff the duty of disclosing facts sufficient to permit him to make an informed consent to the use of general anesthesia. The Court held that, under such circumstances, it was incumbent upon the plaintiff to establish by expert testimony which of the physicians, if any, owed him the duty of disclosing information sufficient for him to exercise an informed consent.