According to the American Psychiatric Association (APA) Practice Guidelines for the Treatment of Patients with Bipolar Disorder, biochemical hypothyroidism develops in 5% to 35% of patients with bipolar disorder, usually within 6 to 18 months of lithium treatment initiation.
The longest-surviving dynasty in the world is the Imperial House of Japan, the Yamato dynasty, whose reign is traditionally dated to 660 BC.
Oman is an absolute monarchy. The Sultan Qaboos bin Said al Said has been the hereditary leader of the country since 1970. Sultan Qaboos is the longest-serving current ruler in the Middle East, and seventh-longest current-reigning monarch in the world. Oman has modest oil reserves, ranking 25th globally.