Low intelligence but not attention deficit hyperactivity disorder is associated with resistance to thyroid hormone caused by mutation R316H in the thyroid hormone receptor beta gene.
Weiss RE, Stein MA, Duck SC, Chyna B, Phillips W, O'Brien T, Gutermuth L, Refetoff S. Low intelligence but not attention deficit hyperactivity disorder is associated with resistance to thyroid hormone caused by mutation R316H in the thyroid hormone receptor beta gene. J Clin Endocrinol Metab. 1994 Jun; 78(6):1525-8.