Measures creatinine levels in serum and urine to track changes from infancy to puberty, indicating growth patterns.
Conclusions(1) The technic described measures all of the creatinine and only creatinine in blood and urine. (2) There is a gradual rise in the serum concentration and in the rate of urinary excretion of creatinine from one month of age to puberty, when adult levels are reached.
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Ruth S. Hare (1950) studied this question.
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