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Mean (±SEM) number of gapes elicited by LiCl-paired saccharin solution during the drug-free test trial. During conditioning, rats were pretreated with systemic saline (SAL), WAY100135 (10 mg·kg−1, i.p.) or WAY100635 (0.1 mg·kg−1, i.p.) 15 min prior to systemic vehicle (VEH) or CBD (5 mg·kg−1, s.c.). *P < 0.05, significant difference.
