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Purpose – The paper sets out to focus on the upper level of knowledge cities of the world. Design/methodology/approach – They are analyzed in terms of research output in total and for three disciplines: biotechnology, information and communications technology, and nanotechnology. The concept of knowledge in regional and urban competition is generally(More)
Ocular histoplasmosis syndrome is prevalent among persons living in the vicinity of the Ohio River Valley. Only a small proportion of patients with ophthalmoscopic evidence of prior Histoplasma capsulatum infection ever develop visual symptoms. Visual morbidity usually follows the development of a macular choroidal neovascular membrane which causes serous(More)
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