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Zimmermann, Laura J., Luigi Ferrucci, Kiang Liu, Lu Tian, Jack M. Guralnik, Michael H. Criqui, Yihua Liao, e Mary M. McDermott. "Poorer Clock Draw Test Scores Are Associated With Greater Functional Impairment in Peripheral Artery Disease: The Walking and Leg Circulation Study II." Vasc Med 2011.

Zimmermann, Laura J., et al. "Poorer Clock Draw Test Scores Are Associated With Greater Functional Impairment in Peripheral Artery Disease: The Walking and Leg Circulation Study II." Vasc Med 2011.