The “Metabolic biomarkers of frailty in older people with type 2 diabetes mellitus” (MetaboFrail) study: Rationale, design and methods

Riccardo Calvani, Leocadio Rodriguez-Mañas, Anna Picca, Federico Marini, Alessandra Biancolillo, Olga Laosa, Laura Pedraza, Jacopo Gervasoni, Aniello Primiano, Alfredo Miccheli, Isabelle Bourdel-Marchasson, Sophie C. Regueme, Roberto Bernabei, Emanuele Marzetti^*, Alan J. Sinclair, Giovanni Gambassi