Cotton D J, Powderly W G, Feinberg J, Abrams D I, Chaisson R E, Wheat L J, Finkelstein D M, Tallman V, Zimmer B, Berzon R
Department of Health Policy and Management, Harvard School of Public Health, Boston, Massachusetts 02115.
Clin Infect Dis. 1993 Jun;16(6):816-22; discussion 823-4. doi: 10.1093/clind/16.6.816.