Biological factors. There are several diseases and diseases of patients caused by the body and brain and cause of diseases such as hepatitis a short meditation-the puck a little wind (lombamu) Disease, lack of food (especially, protein) Premature children. Children with low body weight in children's encephalitis disease in the oven of a brain pathology in children from the study found that there are abnormalities in the functioning of the brain, the brain is smaller than normal and has a substance that helps the nervous system signal is lower than normal.
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