“…However, this study found no statistically significant T3, T4, or TSH changes after exposure to 915 MHz RFID [ 22 ]. The in-vitro studies performed by Asl et al (2013) and Mahmoudi et al (2014) used serum sample cells of healthy donors and exposed the samples to 900MHz from a GSM mobile phone simulator for 18 and 30 minutes, respectively [ 23 , 24 ]. The studies found no statistically significant differences in serum T3 levels of the exposed groups of cells compared to controls (P > 0.05) [ 23 , 24 ].…”