Early rheumatoid arthritis tends to affect your smaller joints first â particularly the joints that attach your fingers to your hands and your toes to your feet. As the disease progresses, symptoms often spread to the wrists, knees, ankles, elbows, hips and shoulders. In most cases, symptoms occur in the same joints on both sides of your body.
The Arabian Peninsula plays a critical geopolitical role in the Middle East and the Arab world due to its vast reserves of oil and natural gas. Before the modern era, it was divided into four distinct regions: Hejaz, Najd, Southern Arabia and Eastern Arabia.
From a geological perspective, it is considered a subcontinent of Asia. It is the largest peninsula in the world, at 3,237,500 km2 (1,250,000 sq mi). The Arabian Peninsula consists of the countries Yemen, Oman, Qatar, Bahrain, Kuwait, Saudi Arabia and the United Arab Emirates, and parts of Jordan and Iraq.