Citation Select	Palareti G, Hirsh J, Legnani C, Manotti C, D'Angelo A, Pengo V, Moia M, Guazzaloca G, Musolesi S, Coccheri S Oral Anticoagulation Treatment in the Elderly. A Nested, Prospective, Case-Control Study Arch Intern Med. 2000 Feb 28;160(4):470-8