Polycythemia Vera. This slow-developing disease occurs when bone marrow produces too many red blood cells, which can lead to thickening of the blood. The condition is thought to be caused in part by a mutation in a gene called JAK2, which regulates the production of various types of blood cells, keeping them in proper balance.
Hilly landscapes and cathedrals dominate much of Andalusia, Spain. The Iberian Peninsula, predominately occupied by the European countries of Spain and Portugal, lies in southwestern Europe. With an area of 582,000 square kilometers, its is the third largest peninsula in the continent.
Such globally famous cities as Madrid, Barcelona, Lisbon, and Valencia are located on this peninsula, which has a total population of approximately 53 million people. The Iberian Peninsula overflows with tourists throughout the year, who visit this region to get a taste of its rich and diverse culture. Several UNESCO World Heritage Sites are located here, including the Cave of Altamira, the Aqueduct of Segovia, and the historic center of CÃ³rdoba.