title: Reply by L. Maffioli.
authors.affiliation: Nuclear Medicine Department, A.S.S.T. Ovest Milanese, Via Papa Giovanni Paolo II, Legnano, Milan, 20025, Italy. lsmaffioli@yahoo.com.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Maffioli
authors.affiliation: Nuclear Medicine Department, A.S.S.T. Ovest Milanese, Via Papa Giovanni Paolo II, Legnano, Milan, 20025, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Dellavedova
authors.affiliation: Nuclear Medicine Department, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via Francesco Sforza 35, Milano, 20122, Italy.
authors.forename: Luigia
authors.initials: L
authors.lastname: Florimonte