Muhammad Awais, Saima Ashraf, Abida Shehzadi, Asad Shabbir, Manahal Sughra, Khadija Bibi. Comparative Analysis of Zinc Concentrations in Blood, Hair, and Nails of Leather Industry Workers and Unexposed Controls: An Analytical Cross-Sectional Study. JHWCR. Published online September 19, 2025:e853. doi:10.61919/f3y6yx46