Skinner M, Lewis W D, Jones L A, Kasirsky J, Kane K, Ju S T, Jenkins R, Falk R H, Simms R W, Cohen A S
Department of Medicine, Boston City Hospital, Massachusetts.
Ann Intern Med. 1994 Jan 15;120(2):133-4. doi: 10.7326/0003-4819-120-2-199401150-00006.