SOURCES: British Medical Journal, May 10, 1997. Robert Provine, professor of psychology and neuroscience, University of Maryland, Baltimore County. Brian Smart, MD, chairman, Asthma and Allergy Center, DuPage Medical Group, Glen Ellyn, Ill.; spokesman, American Academy of Allergy, Asthma and Immunology. Ed Toriello, MD, orthopedic surgeon, Middle Village, N.Y.; fellow of the American Academy of Orthopaedic Surgeons. American Academy of Family Physicians. University of Cincinnati. University of Kentucky College of Agriculture. Indiana University School of Medicine. American Association of Orthopaedic Surgeons. WebMD Medical News: "Songs Stick in Everyone's Head."

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