Spectrum of disease and relation to place of exposure among ill returned travelers [corrected] [published erratum appears in N ENGL J MED 2006 Aug 31;355(9):967]. - Freedman DO; Weld LH; Kozarsky PE; Fisk T; Robins R; von Sonnenburg F; Keystone JS; Pandey P; Cetron MS; GeoSentinel Surveillance Network (New England Journal of Medicine, 2006)