Washington: Teenagers who engage in shift work may be at risk for multiple sclerosis due to a disruption in their circadian rhythm and sleep pattern, Swedish researchers say.Dr. Anna Karin Hedstrom and colleagues from the Karolinska Institutet in Stockholm analyzed data from two population-based studies—one with 1343 incident cases of MS and 2900 controls and another with 5129 prevalent MS cases and 4509 controls.
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