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Nutrients|May 14, 2022
Can Lactose Intolerance Be a Cause of Constipation? A Narrative ReviewJulia Leszkowicz, Katarzyna Plata-Nazar, Agnieszka Szlagatys-SidorkiewiczJournal of Pediatric Surgery|March 4, 2026
Definitive surgery for Hirschsprung Disease between 3 and 12 months achieves best outcomes: A Systematic Review with Meta-AnalysisOliver Sowulewski, Julia Leszkowicz, Marlena Sakowska, et al.Pediatric Reports|January 21, 2026
Severe Abdominal Pain Mimicking Appendicitis Caused by Imperforate Hymen: Case Report and Narrative ReviewJulia Kleina, Marcin Wieczorek, Karolina Markowska, et al.BMC Infectious Diseases|November 20, 2020
Before-and-after online community survey on knowledge and perception of COVID-19 pandemicWojciech Nazar, Julia Leszkowicz, Agata Pieńkowska, et al.International Journal of Environmental Research and Public Health|August 7, 2021
Does Informal Education Training Increase Awareness of Anaphylaxis among Students of Medicine? Before-After Survey StudyJulia Leszkowicz, Agata Pieńkowska, Wojciech Nazar, et al.BMC Pediatrics|December 9, 2025
Mobile app improves treatment of functional constipation in children: a randomized single-blind studyJulia Leszkowicz, Wojciech Nazar, Karolina Wysokińska-Zakrzewska, et al.Journal of Clinical Medicine|February 26, 2025
The Validity and Reliability of the Polish Version of the PedsQL™ Gastrointestinal Symptoms Module for Pediatric Patients (Aged 2-18)Julia Leszkowicz, Małgorzata Kasprowicz-Janisz, Anna Kotarska, et al.Pageof 1