Armañac-Julián, Pablo Kontaxis, Spyridon Lázaro, Jesús Rapalis, Andrius Brazaitis, Marius Marozas, Vaidotas Laguna, Pablo Bailón, Raquel Gil, Eduardo Vascular reactivity characterized by PPG-derived pulse wave velocity Biomed. signal proces. control 10.1016/j.bspc.2025.107641 2025 2025