Not having enough iodine in the diet is a rare cause of hypothyroidism in the U.S. Other causes of primary hypothyroidism include: 1  Certain drugs such as lithium. 2  Radiation exposure to the neck. 3  Radioactive iodine used for treatment of hyperthyroidism (overactive thyroid). 4  Special x-ray dyes.
Princeton, TX. Princeton is located in northeast Texas. Princeton is part of Collin County. Princeton has 7.40 square miles of land area and 0.06 square miles of water area. As of 2010-2014, the total Princeton population is 7,520, which has grown 116.28% since 2000.
Callahan County is a county located in the U.S. state of Texas. As of the 2010 census, the population was 13,544. Its county seat is Baird. The county was founded in 1858 and later organized in 1877. It is named for James Hughes Callahan, a soldier in the Texas Revolution. Callahan County is included in the Abilene, TX Metropolitan Statistical Area.