Intranasal insulin affects brain, but not peripheral tissue, glucose uptake in lean, healthy men: a positron emission tomography study. - Latva-Rasku, Aino; Laurila, Sanna; Karjalainen, Tomi; Klén, Riku; Löyttyniemi, Eliisa; Eskola, Olli; Nummenmaa, Lauri; Heni, Martin; Nuutila, Pirjo (American Journal of Physiology: Endocrinology & Metabolism, 2026)