Biosignals by Wearable Devices in Hypothyroidism

All participants of this study are decided to get radioactive iodine therapy using levothyroxine withdrawal or human recombinant TSH injection prior to the study enrollment. That decision is independent with this study protocol. This study just collect continuous bio signals using wearable devices in the patients undergoing two different preparation methods for radioactive iodine therapy. That is why this study is an observational cohort study.