Tursi, A., R. De Bastiani, M. Franceschi, E. Goni, M. Riccò, M. Venerito, M. Rugge, C. Scarpignato, M. Picchio, F. Di Mario, and the P. C. collaborative group. “Non-Invasive Assessment of Gastric Secretory Function in Centenarians”. Geriatric Care, vol. 3, no. 1, May 2017, doi:10.4081/gc.2017.6682.