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Furthermore, possible correlations between white matter lesion scores, ventricular width, and age were investigated. The study involved a group of 38 consecutively studied patients with clinical and radiological evidence of idiopathic NPH, for whom a frontal brain biopsy was obtained. For 29 patients, hydrodynamic criteria of NPH get a free sample of viagra fulfilled and a ventriculoperitoneal shunt was performed.

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