aDepartments of Internal Medicine and Anatomy and Neurosciences, University of Texas Medical Branch, Galveston, TX 77555-0632, USA bDepartment of Oral and Craniofacial Biological Sciences, Dental School, Program in Neurosciences, University of Maryland, Baltimore, MD 21201, USA ∗Corresponding author. Tel.: +1-409-747-3083; fax: +1-409-747-3084 E-mail: [email protected] Accepted February 21, 2002.
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Al–Chaer et al. (2002) studied this question.
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