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.
RELATIVE LOCATION: Located in far southwestern Europe on the Iberian Peninsula Spain is geographically positioned in the northern, as well as the eastern and western hemispheres. Spain is bordered by the countries of Andorra, France and Portugal, and by the British colony of Gibraltar. The country is almost completely surrounded by water, including the Atlantic Ocean, Bay of Biscay, Strait of Gibraltar, Alboran, Balearic and Mediterranean Seas.