Fig. 2From: Clinical characteristics and drug utilisation patterns in patients with chronic cough: a retrospective cohort study using a Japanese claims databaseStudy flow diagram. 1As defined in Table1. 2Medical conditions which are exclusion criteria for the study are listed in Additional file 1: Table 1. Study period: 1st January 2017 to 31st August 2020; selection period: 1st July 2017 and 31st August 2019. ACE: angiotensin-converting enzymeBack to article page