“…Our results went in line with Choi et al’s study, who experimentally found that smoking might relieve physiological and psychological responses to stress (Choi, Ota, & Watanuki, ). On the other hand, several studies reported that smoking was positively associated with PD (Choi, Chan, & Lehto, ; Zvolensky et al, ). Skov‐Ettrup, Nordestgaard, Petersen, and Tolstrup () concluded from a large study (including 90,108 participants) that there was no clear evidence that high tobacco smoking was causally associated with PD, but co‐occurrence is important to be considered in interventions for smoking cessation, whatever causes this strong association.…”