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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.