AUTHOR=Kolivand Pirhossein , Saberian Peyman , Arabloo Jalal , Namdar Peyman , Doroudi Taher , Marashi Ali , Behzadifar Masoud , Karimi Fereshte , Rajaei Soheila , Raei Behzad , Ehsanzadeh Seyed Jafar , Parvari Arash , Azari Samad TITLE=Hospitalization, mortality, and health service delivery pattern among Iranian Hajj pilgrims by age, sex, and province in 2013–22 JOURNAL=Frontiers in Public Health VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2025.1451591 DOI=10.3389/fpubh.2025.1451591 ISSN=2296-2565