Background: UVB-induced skin synthesis is considered the key source of vitamin D, yet exposure to...
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Background The aetiology of ANCA-associated vasculitis (AAV) and triggers of relapse are poorl...
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Many nations responded to the corona virus disease-2019 (COVID-19) pandemic by restricting travel...
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In northern and central Ethiopia, 2015 was a very dry year. Rainfall was only from one-half to th...
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