Cimarex was formed in February 2002 as a wholly owned subsidiary of Tulsa-based Helmerich & Payne, Inc. On September 30, 2002, Cimarex was completely spun off to Helmerich and Payne shareholders and simultaneously merged with Denver-based Key Production Company, Inc.
A few others such as rheumatoid arthritis and autoimmune diseases of the thyroid gland are most commonly seen in older individuals. However, many of the autoimmune diseases such as lupus and multiple sclerosis are most common in women during the ages of twenty to forty.
Acquired aplastic anemia is usually considered an autoimmune disease. Normally, your immune system attacks only foreign substances. When your immune system attacks your own body, you are said to have an autoimmune disease. Other autoimmune diseases include rheumatoid arthritis and lupus.