Opinion & Commentary
Letters are brief communications responding to published work or reporting very short observations.
Letters are brief communications responding to published work or reporting very short observations.
When to select this type
Choose Letter for brief responses or very short observations.
Typical audience
Journal readers and authors of related work.
Recommended use cases
Purpose
Enable rapid scholarly correspondence.
Scope
Short format communications under 1,000 words typically.
Typical structure
Required sections
Recommended sections
Figures
0–1 optional.
Tables
None.
References
0–10 references.
Supplementary material
Rarely used.
Required metadata
Required declarations
Funding requirements
Rarely applicable; declare if present.
Conflict of interest
Required.
Ethics requirements
If patient data included.
Consent requirements
If case material included.
Data availability
Not typically applicable.
AI disclosure
Disclose if used.
Copyright
Authors retain copyright.
Licensing
Platform standard.
Export formats supported
No specific reporting guideline is required, though field standards may still apply.
Typical journal expectations
Brevity and professional tone.
Typical peer review process
Rapid editorial review.
Journal compatibility notes
Correspondence sections of journals.
Submission readiness checklist
Select Letter when your manuscript matches the scope, structure, and reporting expectations described on this page. If your work fits a different scholarly format, review similar publication types before submitting.
Contact the editorial team before payment if you need to change publication type. After editorial screening begins, type changes require editorial approval and may restart parts of the review process.
Reporting guidelines listed as recommended should be followed when applicable to your study design. Editorial reviewers assess completeness against the expectations for your selected publication type.
Platform standards for ethical research publication.
Transparent, ethical, and accountable AI use across research and publishing.
Transparency, independence, and responsible disclosure across research and publishing.