From the Maxwell Finland Laboratory for Infectious Diseases, Boston Medical Center, Boston, MA 02118. Accepted for publication Dec. 13, 1999. Dr. Klein is a member of the Wyeth Scientific Advisory Board, a member of the Scientific Advisory Committee of the Kaiser-Permanent Study Center and is editor of the web site: http://www.pneumo.com/ which is supported by an educational grant from Wyeth-Lederle Vaccines. Reprints not available.
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Jerome O. Klein (2000) studied this question.
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