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Biographical method

Biographical method – a way of obtaining information by means of the questionnaire (the special questionnaire) addressed to the inspected institutions and persons. The biographical method is widely applied when studying the sociological and demographic phenomena.

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The 74-year-old resident of Australia James Harrison became blood donor about 1000 times. It has a rare blood group which antibodies help to survive the newborn with a severe form of anemia. Thus, the Australian saved about two million children.