Dr. Anthony M. Berson, St. Vincent' chief radiation oncologist, reworked Mr. Jerome-Parks's radiation treatment plan to give more protection to his teeth. Nina Kalach, the medical physicist in charge of implementing Jerome-Parks's radiation treatment plan used Varian software to revise the plan. State records show that as Ms. Kalach was trying to save her work, the computer began seizing up, displaying an error message. The error message asked if Ms. Kalach wanted to save her changes before the program aborted and she responded that she did. Dr. Berson approved the plan.