Watts MS.
West J Med. 1984 Feb;140(2):274-5.
PMID: 6730472

Sachatello CR.
J Ky Med Assoc. 1982 Feb;80(2):78-81.
PMID: 7057075

Knieser K.
Hospitals. 1982 Jan 01;56(1):31.
PMID: 7053339

Mahar M.
Manag Care. 2007 Feb;16(2):46-50, 55.
PMID: 17361510

Kristeller AR.
Am Heart Hosp J. 2007;5(2):127.
PMID: 17523256

Bale CJ.
Med Prod Sales. 1981 Sep;12(9):1, 24-5, 27-8.
PMID: 10324165

Fetscher SR.
N Engl J Med. 1996 Aug 08;335(6):434; author reply 437-8. doi: 10.1056/NEJM199608083350613.
PMID: 8676936