Gastrointestinal Unit;
Department of Medicine and Surgery;
University of Salerno;
84081 Salerno;
Italy;
Department of Clinical Medicine and Surgery;
University Federico Ⅱ of Naples;
80131 Naples;
Italy;
Proximal; gastric; function; Gastric; accommodation; 2-Dimensional; ultrasound; 3-Dimensional; ultrasound; Functional; dyspepsia; Rome; Ⅲ; criteria;