Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13071-021-04655-z/MediaObjects/13071_2021_4655_Fig1_HTML.png)
Study flow chart. N = number of patients undergoing each investigation at each study time point; by definition, for patient classification, all patients underwent microscopy at baseline. Eos eosinophil count, F-U follow-up. Attended follow-up—both F-U time points = number of patients who presented to both T6 and T12 follow-up time points and how many of them underwent each of the listed diagnostic exams, independently from the result of the exam. Attended follow-up—only T6/T12 = number of patients who presented to only the T6 or only the T12 follow-up time point and how many of them underwent each of the listed diagnostic exams at the indicated time-point, independently from the result of the exam