 4. In the 13th and 26th weeks, the Control Group will use a blinded RT-CGM for one week. The RT-CGM Group will continue to use the unblinded RT-CGM. The Control Group will return the blinded RT-CGM to the clinic after a week. The data will be reviewed by personnel who are not involved in the care of the subject to determine if additional blinded sensor data are needed. The blinded data will not be reviewed by study personnel for management decisions until the end of the first 6 months of the study. 