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. 2020 May 5:10.1213/ANE.0000000000004937. doi: 10.1213/ANE.0000000000004937

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Copyright © 2020 International Anesthesia Research Society

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Figure. — The droplet spreading patterns of panels (A), (B), (C), transparent plastic sheet (D), and noncoverage technique (E). F, The volcano eruption-like effect and the uncontrollable lava flow under the sheet.