This journal provides immediate access to some articles. Volume 270(1524); August 7, 2003 Reproduction and longevity among the British peerage: the effect of frailty and health selection. PMCID: PMC1691410 Evidence for gene flow via seed dispersal from crop to wild relatives in Beta vulgaris (Chenopodiaceae): consequences for the release of genetically modified crop species with weedy lineages. PMCID: PMC1691408 Transients and attractors in epidemics. PMCID: PMC1691412 Assessment of the risk posed by bovine spongiform encephalopathy in cattle in Great Britain and the impact of potential changes to current control measures. PMCID: PMC1691417 | ||