“…Two additional physiologic reactions, coughing and difficulty inhaling, were collected only for smokers as these symptoms are irrelevant for snus users. The ESE scale has been validated in different subgroups of individuals for the reactions buzz and dizziness (Perkins, Lerman, Coddington, & Karelitz, 2008;Pomerleau, Pomerleau, Mehringer, Snedecor, & Cameron, 2005), but to our knowledge, not for snus users. Responses on the ESE were rated on a four-point Likert scale of none, slight, moderate, and intense, and collapsed into the binary response of none versus any for all analyses, consistent with prior reports (DiFranza et al, 2004;Haberstick et al, 2011;Post, Gilljam, Rosendahl, Bremberg, & Galanti, 2010;Richardson, Okoli, Ratner, & Johnson, 2010).…”