Exploration of Asthma & Allergy

Endoscopic feature	Grading criteria
Edema	Grade 0: distinct vascularity Grade 1: absent or decreased vascularity
Rings	Grade 0: none Grade 1: mild (ridges) Grade 2: moderate (distinct rings) Grade 3: severe (scope will not pass)
Exudates	Grade 0: none Grade 1: mild (≤ 10% surface area) Grade 2: severe (> 10% surface area)
Furrows	Grade 0: none Grade 1: mild Grade 2: severe
Stricture	Grade 0: absent Grade 1: present

Declarations

Author contributions

AR: Conceptualization, Investigation, Methodology, Supervision, Writing—original draft, Writing—review & editing. The author read and approved the submitted version.

Conflicts of interest

The author declares that he has no conflicts of interest.

Ethical approval

The study involved in Figure 1 complies with the Declaration of Helsinki. Ethical approval for that study was not required because the endoscopic procedures by which the images were obtained were carried out according to Good Clinical Practice.

Consent to participate

Not applicable.

Consent to publication

Not applicable.

Availability of data and materials

The data involved in Figure 1 could be available from the corresponding author upon reasonable request.

Funding

Not applicable.

Copyright

Publisher’s note

Open Exploration maintains a neutral stance on jurisdictional claims in published institutional affiliations and maps. All opinions expressed in this article are the personal views of the author(s) and do not represent the stance of the editorial team or the publisher.

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