Substudy 'B' of the Accuracy of Ingestible Event Marker (IEM) Detection by the Medical Information Device #1 (MIND1)

Following placement of the Patch by clinic staff, subjects will ingest one placebo-embedded IEM tablet approximately every other hour, for a total of 4 ingestions. Subjects may eat as they wish over the course of the day. Placebo-embedded IEM tablets are being tested to measure the accuracy of IEM detection by the MIND1 system. Clinic staff will record the time of each ingestion of an IEM. Clinic staff will check the compatible computing device (eg, smartphone) at 30-minute intervals for the presence of a timeline ingestion tile and will record the time it is detected by the MIND1 System compatible computing device (eg, smartphone).