AUTHOR=Zhang Yuying , Qiu Shuangyan , Guo Vivian Yawei , Chen Weiqing , Han Xiaomei , Yang Weikang TITLE=Association of only-child status and household pet ownership with attention-deficit/hyperactivity disorder among Chinese preschool children: a population-based study JOURNAL=Frontiers in Public Health VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2024.1450216 DOI=10.3389/fpubh.2024.1450216 ISSN=2296-2565