The neuroactive potential of the elderly human gut microbiome is associated with mental health status - Paulina Calderón-Romero; Benjamin Valderrama; Thomaz F. S. Bastiaanssen; Patricia Lillo; Daniela Thumala-Dockendorff; Gerard Clarke; John F. Cryan; Andrea Slachevsky; Christian González-Billault; Felipe A. Court (PLoS ONE, 2026)