A Rome preliminary hearing judge on Friday indicted four doctors who treated acclaimed journalist Andrea Purgatori before his death in July 2023.     Radiologist Gianfranco Gualdi, his assistant Claudio Di Biasi and Dr. Maria Chiara Colaiacomo, both members of his team, and cardiologist Guido Laudani, have been charged with manslaughter.     The trial is scheduled for January 12.     Journalist, screenwriter and author Purgatori died of a sudden illness in Rome aged 70 on July 19, 2023.