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Optometry - Journal of the American Optometric Association > 2005 > 76 > 1 > 19-29
Journal of Pain and Symptom Management > 2001 > 22 > 2 > 637-648
Optometry - Journal of the American Optometric Association > 2005 > 76 > 1 > 19-29
Journal of Pain and Symptom Management > 2001 > 22 > 2 > 637-648