Key points are not available for this paper at this time.
Level 5 evidence leaves open any clinical implications; prospective trials required before practice consideration.
Montreal, Canada Stony Brook, New York Authors wishing to submit to this department should contact Dr. Stewart at the following address: Montreal Neurological Institute, 3801 University Street, Montreal, PG, Canada H3A 2B4; tel, (514) 398-8980; fax, (514) 398-1285; email, john.stewart.muhc.mcgill.ca
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Rahman Pourmand (2002) studied this question.
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