In the article titled “The Relationship between Population T4/TSH Set Point Data and T4/TSH Physiology,” [1] there was an error in Figure 2(b), which should be corrected as shown in Figure 2.

(a) The TSH curve, (b, c) the T4 curve (on different axes, KT approx. 41), and (d) the location of the T4/TSH set point.

TSH response to free T4

Free T4 response to TSH

Free T4 response to TSH

Free T4/TSH levels

Additionally, there were errors in Results, where the statement “The slope (−0.6) of the population curve in the normal range [5] is similar to the slope (−0.59) of the curve of physiological TSH studies [2], and therefore it would seem more likely that the slope there has been generated by the mechanism described in Figure 4(a), that is, the different degrees of variation in organ sensitivity” should be corrected to “The slope (−0.06) of the population curve in the normal range [5] is similar to the slope (−0.059) of the curve of physiological TSH studies [2], and therefore it would seem more likely that the slope there has been generated by the mechanism described in Figure 4(a), that is, the different degrees of variation in organ sensitivity.”

FitzgeraldS. P.BeanN. G.The relationship between population T4/TSH set point data and T4/TSH physiology