Peng, Zhen
Wang, Lin
Article History
Received: 18 June 2026
Accepted: 19 August 2026
First Online: 25 August 2026
Declarations
Ethics approval and consent to participate: This study was conducted in accordance with the ethical principles of the World Medical Association Declaration of Helsinki, where applicable. Ethics approval and informed consent to participate were not required because the study exclusively used aggregated, publicly available city-level statistical data and did not involve human participants, identifiable or individual-level human data, clinical records, human tissue, or biological samples.
Consent for publication: Not applicable.
Competing interests: The authors declare no competing interests.