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The N95 masks and KN95 masks consist typically of several layers of a polypropylene plastic polymer, a synthetic material, and they are designed to be worn over the mouth and nose secured by straps.

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Background and purpose: Most patients with end-stage renal disease (ERSD) visiting our hospital for hemodialysis treatment during the SARS outbreak wore an N95 mask. Data on the physiological stress imposed by the wearing of N95 masks remains limited. This study investigated the physiological impact of wearing an N95 mask during hemodialysis (HD) on patients with ESRD.

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