Rivera v. Saint Francis Hospital & Medical Center, 55 Conn. App. 460, 738 A.2d 1151 (1999) involved a plaintiff who brought an action against a hospital and two physicians. There was no unity of interest, although the physicians were employed by the hospital and they had the same attorney. The lack of unity of interest arose out of the facts that there was no surgical procedure in which both physicians were involved, the claims against the defendants were not identical, and it was possible for the plaintiff to prove one specification of negligence that proximately caused his injury as to one physician, but not the other or not the hospital. Rivera v. Saint Francis Hospital & Medical Center, supra, 466.