Explainable AI for gait speed analysis from multimodal data fusion - Abdullah Alharthi; Abdulrahman Al Ayidh; Ahmed Alqurashi; Mohammed Alammar; Shoaib Shahriar Mohammad; Houssem Bouchekara; Yusuf Abubakar Sha’aban; Turki Essa Alharbi (PLoS ONE, 2026)