Long-lived growth hormone receptor knockout mice show a delay in age-related changes of body composition and bone characteristics. - Bonkowski MS; Pamenter RW; Rocha JS; Masternak MM; Panici JA; Bartke A; Bonkowski, Michael S; Pamenter, Richard W; Rocha, Juliana S; Masternak, Michal M; Panici, Jacob A; Bartke, Andrzej (Journals of Gerontology Series A: Biological Sciences & Medical Sciences, 2006)