Endemic urinary lithiasis is a clinical entity with the following characteristics: a high prevalence in boys, a high percentage of bladder stones, uric acid as the usual chemical constituent of the stones, restriction to the lower social and economic classes, a well-marked peak incidence of the disease between 2 and 4 years and a limitation to certain parts of the world.
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H.B. Eckstein (1961) studied this question.
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