1 Department of Biological and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, Messina, 98166, Italy.
2 Department of Pharmacological and Physiological Science, Saint Louis University School of Medicine, 1402 South Grand Blvd, St Louis, MO, 63104, USA.
3 Department of Biological and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres, 31, Messina, 98166, Italy. eesposito@unime.it.