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[\'Department of Internal Medicine, College of Medicine, Hanyang University, Seoul 04763, Korea.\', \'Department of Internal Medicine, College of Medicine, Korea University, Seoul 02841, Korea.\', \'Department of General Surgery, National Health Insurance Ilsan Hospital, Goyang 10326, Korea.\', \'Department of Physical Medicine and Rehabilitation, National Health Insurance Ilsan Hospital, Goyang 10326, Korea.\']
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