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(a) Percent of Slow Wave Coupling (PSWC) from EGG measurements on normal controls and patients. EGG is able to detect a difference in slow wave coupling for patients, but propagation velocity cannot be determined. (b) Propagation velocity determined from SOBI-MGG for control subjects and gastroparesis patients pre- and postprandial. * indicates significant difference vs. control (p < 0.05).
