PHILIP PULLELLA WHEN Pope John Paul II was admitted to Rome's Gemelli hospital on July 12, 1992, he told the world himself a few hours earlier during his regular Sunday address in St. Peter's Square. "I would like to let you in on a secret," he said before revealing that he would enter the hospital that night. His departure from the Vatican, the crowds lining his motorcade route, and his arrival at the hospital's front entrance in a black Mercedes convertible were broadcast on television. When Pope Francis entered the same hospital last Sunday, the Vatican announced it in a…