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APA Citation
Behnke, S., Berg, D., Naumann, M., & Becker, G. (2005). differentiation of Parkinson's disease and atypical parkinsonian syndromes by transcranial ultrasound. Journal of neurology, neurosurgery and psychiatry, 76(3), 423–425. http://access.bl.uk/ark:/81055/vdc_100135165537.0x000038