Milan F B, Landau C, Murphy D R, Balletto J J, Sztykowski T, Hart J A, Rybeck C H, Cyr M G
Division of General Internal Medicine, Rhode Island Hospital, Providence 02903, USA.
J Gen Intern Med. 1998 Aug;13(8):562-7. doi: 10.1046/j.1525-1497.1998.00168.x.