1. Department of Pharmacy; Research Centre on Bioactive Peptides (CIRPeB); University of Naples “Federico II” and DFM Scarl; Via Mezzocannone 16 80134 Naples Italy
2. Department of Molecular Biotechnologies and Health Science; University of Turin; Via Nizza 52 10125 Turin Italy
3. Department of Chemical Sciences; University of Catania; Viale A. Doria 6 95124 Catania Italy
4. I. N. B. B. Consortium; Viale delle Medaglie D'Oro 305 00136 Rome Italy