Corrigendum: Cellular Distribution of Canonical and Putative Cannabinoid Receptors in Canine Cervical Dorsal Root Ganglia - Chiocchetti, Roberto; Galiazzo, Giorgia; Tagliavia, Claudio; Stanzani, Agnese; Giancola, Fiorella; Menchetti, Marika; Militerno, Gianfranco; Bernardini, Chiara; Forni, Monica; Mandrioli, Luciana (Frontiers in Veterinary Science, 2019)