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Smiling sincerely or grimacing can significantly reduce the pain of needle injection
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Smiling sincerely or grimacing can significantly reduce the pain of needle injection

by  University of California, Irvine Chopsticks were used in the study to help subjects hold one of four facial expressions: A. neutral, B. non-Duchenne smile, C. Duchenne smile and D. grimace. Credit: Katherine V. Hammond / University of Oregon The coming of winter means cooler temperatures, shorter days and flu shots. While no one looks forward...