1. Steckelberg JM, Melton L, Ilstrup DM, Rouse MS, Wilson WR: Influence of referral bias on the apparent clinical spectrum of infective endocarditis. American Journal of Medicine 1990, 88: 582–588.
2. Bayliss R, Clarke C, Oakley CM, Somerville W, Whitfield AGW, Young SE: Incidence, mortality and prevention of infective endocarditis. Journal of the Royal College of Physicians of London 1986, 20: 15–20.
3. Patton JP: Infective endocarditis: economic considerations. In: Kaye D (ed): Infective endocarditis. Raven Press, New York, 1992, p. 413–422.
4. Commission on Professional and Hospital Activities: Length of stay by diagnosis and operation. Health Care Knowledge Systems, Ann Arbor, Ml, 1989.
5. Francioli P, Etienne N, Hoigné R, Thys P, Gerber A: Treatment of streptococcal endocarditis with a single daily dose of ceftriaxone sodium for 4 weeks: efficacy and out-patient treatment feasibility. Journal of the American Medical Association 1992, 267: 264–267.