Enright PL, McBurnie MAnn, Bittner V, Tracy RP, McNamara R, Arnold A, Newman AB. The 6-min walk test: a quick measure of functional status in elderly adults. Chest. 2003  ;123(2):387-98.

Quan SF, Katz R, Olson J, Bonekat W, Enright PL, Young T, Newman A. Factors associated with incidence and persistence of symptoms of disturbed sleep in an elderly cohort: the Cardiovascular Health Study. Am J Med Sci. 2005  ;329(4):163-72.

Brach JS, Solomon C, Naydeck BL, Sutton-Tyrrell K, Enright PL, Jenny NSwords, Chaves PM, Newman AB. Incident physical disability in people with lower extremity peripheral arterial disease: the role of cardiovascular disease. J Am Geriatr Soc. 2008  ;56(6):1037-44.