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Parasympathetic nervous system
The parasympathetic nervous system is one of three divisions of the autonomic nervous system. Sometimes called the rest and digest system, the parasympathetic system conserves energy as it slows the ... > more -
Hepatitis B
Originally known as serum hepatitis, hepatitis B has only been recognized as such since World War II, and has caused current epidemics in parts of Asia and ... > more -
Health benefits of tea
The possible beneficial health effects of tea consumption have been suggested and supported by some studies, but others have not found beneficial effects. Studies claim that the polyphenol content of ... > more -
Epstein-Barr virus
The Epstein-Barr virus (EBV), also called Human herpesvirus 4 (HHV-4), is a virus of the herpes family (which includes Herpes simplex virus and Cytomegalovirus), and is one of the most common viruses ... > more -
Cluster headache
Cluster headaches are rare, extremely painful and debilitating headaches that occur in groups or clusters. Cluster headache sufferers typically experience severe headaches of a piercing quality near ... > more -
Pernicious anemia
Pernicious anemia refers to a type of autoimmune anemia. Antibodies are directed against intrinsic factor or parietal cells which produce intrinsic factor. Intrinsic factor is required for vitamin ... > more
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