title: Author's reply.
authors.affiliation: Cardiovascular Department, Cardarelli Hospital, Naples, Italy.
authors.forename: Mario
authors.initials: M
authors.lastname: Siniscalchi
authors.affiliation: Medical, Surgical, Neurological, Metabolic and Aging Sciences Department, Second University of Naples, Naples, Italy. Electronic address: drsarducele@gmail.com.
authors.forename: Celestino
authors.initials: C
authors.lastname: Sardu
authors.affiliation: Cardiovascular Department, Cardarelli Hospital, Naples, Italy.
authors.forename: Angelo
authors.initials: A
authors.lastname: Sasso
authors.affiliation: Medical, Surgical, Neurological, Metabolic and Aging Sciences Department, Second University of Naples, Naples, Italy.
authors.forename: Raffaele
authors.initials: R
authors.lastname: Marfella
authors.affiliation: Medical, Surgical, Neurological, Metabolic and Aging Sciences Department, Second University of Naples, Naples, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Paolisso
authors.affiliation: Cardiovascular Department, Cardarelli Hospital, Naples, Italy.
authors.forename: Ciro
authors.initials: C
authors.lastname: Mauro