Erratum to: Micronized/ultramicronized palmitoylethanolamide displays superior oral efficacy compared to nonmicronized palmitoylethanolamide in a rat model of inflammatory pain. Issue 1 (December 2016) - Impellizzeri, Daniela; Bruschetta, Giuseppe; Cordaro, Marika; Crupi, Rosalia; Siracusa, Rosalba; Esposito, Emanuela; Cuzzocrea, Salvatore