title: Martinelli et al. reply.
authors.affiliation: SPIN-CNR, corso Perrone 24, 16152 Genova, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Martinelli
authors.affiliation: SPIN-CNR, corso Perrone 24, 16152 Genova, Italy and University of Genoa, via Dodecaneso 33, 16146 Genova, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Palenzona
authors.affiliation: SPIN-CNR, corso Perrone 24, 16152 Genova, Italy and University of Genoa, via Dodecaneso 33, 16146 Genova, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Putti
authors.affiliation: SPIN-CNR, corso Perrone 24, 16152 Genova, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Ferdeghini
authors.affiliation: SPIN-CNR, corso Perrone 24, 16152 Genova, Italy and Dipartimento di Fisica, University of L'Aquila, Via Vetoio, 10 I-67010 Coppito, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Profeta