mRNA expression of Fibroblast growth factor receptor 1 (FGFR1). Expression of FGFR1 in goiter, FA, FTC, PTC and UTC was analysed by employment of Q-RT-PCR analysis. mRNA expression was measured in relation to FTC133 as positive control and then normalized to the expression of yWHAZ and GAPDH as normalizing markers. Differences are expressed as percent to positive control defined as 100%. *p < 0.05 indicates a statistical significance.