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Initial symptoms are age-dependent. a-i: Age-dependency of initial symptoms: The most common symptoms like renal tubular dysfunction, nephromegaly, growth retardation, rickets, liver dysfunction and carcinoma and the combination of symptoms are depicted. *significant difference (p <0.05) vs < 2 months. n: <2 m =34 patients, 2-6 m = 43 patients, >6 m =61 patients.
