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Social isolation has been recognized as a major risk factor for morbidity and mortality in humans for more than a quarter century… Expand Getting Packed If one neglects the role of specific interactions, the packing of similar-shaped objects will depend only on the… Expand BackgroundThe natural habitat of Staphylococcus aureus is the moist squamous epithelium in the anterior nares. About 20% of the… Expand Muller (1942) and Mayr (1963) hypothesized that natural selection indirectly causes the evolution of reproductive barriers… Expand TM4 is a lytic mycobacteriophage which infects mycobacteria of clinical importance. A luciferase reporter phage, phAE40, has been… Expand Interspecific hybridization has long been the focus of intensive study in many groups of plants. Since the pioneering work of… Expand Individual differences among users of a hierarchical file system were investigated. Results indicate that psychometric tests of… Expand To assess potential abnormalities in collagen metabolism in systemic scleroderma, skin fibroblast lines from patients with this… Expand Juvenile rats were allowed short daily periods of social contact to see if this would reduce the known effects of isolation… Expand 82 The opinion, once held rather widely by biologists, that related species are generally, if not universally, separated by… Expand