1. From the Istituto Superiore di Sanità, Rome; La Sapienza University, Rome; Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Casa Sollievo e Sofferenza Hospital, San Giovanni Rotondo; University of Palermo; Federico II University, Naples; Riuniti Hospital, Reggio Calabria; University of Bari; Montefiascone Hospital; Riuniti Hospital, Bergamo; University of Sassari; Catholic University, Rome, Italy; and International Agency for Research on Cancer, Lyon, France