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Efficacy Of Regular Positioning with Ripple Mattress Vs Ripple Mattress Alone in Preventing Pressure Ulcer Among Geriatric Patients in Medical Ward. JEHS [Internet]. 2024 Dec. 31 [cited 2026 Mar. 21];8(1):45-60. Available from: https://www.ejournal.unimel.edu.my/index.php/JEHS/article/view/1863