Impact of nursing shift patterns on work-related gastrointestinal disorders: a systematic review and meta-analysis. - Pérez-Manchón D; Lozano-Hernández CM; Mata-González G; Arias-Arias AJ; Mayoral-Gonzalo N; Gómez-de Quero Córdoba M; Ruiz-Zaldibar C (Frontiers in public health, 2026)