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All authors of the manuscript must confirm the following:

1. This manuscript has not been submitted or published in another journal.
2. The ownership of the submitted manuscript is hereby transferred to the Pakistan Journal of Chest Medicine after acceptance of the manuscript.
3. They substantially contributed to the conception or design of the work; or the acquisition, analysis, or interpretation of data for the work.
4. They were involved in drafting the work or revising it critically for important intellectual content.
5. They are giving final approval for the version to be published.
6. They will be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
7. They will abide by the policy and regulations of the Pakistan Journal of Chest Medicine (PJCM) updated from time to time.

This copyright information is essential to ensure proper attribution and compliance with the journal's policies and regulations.