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Long-Term Benefits of Smoking Cessation on Gastroesophageal Reflux Disease and Health-Related Quality of Life

Fig 1

Frequency scale for symptoms of gastroesophageal reflux disease.

Questionnaire is consist of 12 questions including 7 (light blue lines) with acid reflux symptoms and 5 (dark blue lines) with dysmotility symptoms.

Fig 1

doi: https://doi.org/10.1371/journal.pone.0147860.g001