Fig. 1From: The efficacy of gabapentin for the treatment of refractory cough associated with interstitial lung disease: study protocol for a randomized, double-blind and placebo-controlled clinical trialFlowchart of the study design. Abbreviations: LCQ, Leicester Quality of Life Questionnaire; Gerd Q, Gastroesophageal Reflux Disease Questionnaire; HARQ, Hull Airway Reflux QuestionnaireBack to article page