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.
On the Mediterranean coast of Spain is Gibraltar (a British territory). Spain is a country located in the southwest of Europe, it is on the Iberian Peninsula, Portugal is to the west, Atlantic Ocean to the north, France to the northeast, the Mediterranean Sea to the east.pain is situated in the southwestern area of Europe. It is  bordered by France on the north and Portugal on the west. It is  also bordered by the Mediterranean Sea, the Bal â¦ earic Sea, and the  Atlantic Ocean.