In patients with chronic idiopathic urticaria, approximately 35% will experience episodes of angioedema and 25% are positive for dermatographism. Like many autoimmune diseases, chronic idiopathic urticaria has a higher incidence in women than men, with the reported ratio of females to males ranging from 2:1 to 4:1.
Best Answer: Many different tribes, the original slaves brought over by the Portuguese and sold to the Spanish came from the Congo and Angolan regions of central Africa, the Windward Coast and Senegambia to the north. When the British conquered Jamaica the slaves were set free and settled in the interior. They were known as the Maroons and guarded their freedom so fiercely that the British made treaties with them. Those brought in by the British came mostly from west Africa, the Gold Coast and Windward Coast. While some will have been from the local tribes (apparently kidnapping by unscrupulous traders was common) others will have been captives from raids into the interior.
Nearly a quarter of the Africans brought to North America came from Angola, while an equal percentage, arriving later, originated in Senegambia. Over 40 percent of Africans entered the U.S. through the port city of Charleston, South Carolina, the center of the U.S. slave trade.