FIGURE 1. Conventional algorithm used for diagnosis of AD. H & P = history and physical examination; exam = examination; o/w = otherwise; abnl = abnormal; bleed = bleeding; CNS = central nervous system; LP = lumbar puncture; E E G = electroencephalogram; ESR = erythrocyte sedimentation rate; U/A = urinalysis; CXR = chest x-ray; Tox = toxicology; NEG = negative; POS = positive; Labs = laboratory tests.

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