NTRAIN system (IMAGE) Northwestern University Caption In this artistic illustration, a user with an NTRAIN implant and its accompanying external hub works in the field. The user inputs a desired time shift (due to shift work or travel across time zones). Based on cues from the body's physiology, the external hub detects the user's circadian rhythm, and triggers the implant to produce precisely-dosed peptide therapies. Credit Northwestern University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.