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BackgroundOral hygiene is attracting increasing attention as a potential risk factor for cancers. To investigate the association between toothbrushing frequency and upper aerodigestive tract (UADT) cancer, the authors conducted a large‐scale case‐control study.
MethodsA total of 856 UADT cancer case participants and 2696 age‐ and sex‐matched control subjects without cancer were included. Edentulous...
A new method for maskless fabrication of metallic patterns or structures on metals is described. A solution flow type droplet cell, with co-axial dual capillaries was applied to form fine metal structures such as strips and rods. This type of droplet cell enables movement of the cell during formation. Nickel fine patterns with a width of about 200μm were formed on a Cu substrate. The width of the...
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