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. 2020 Apr 9;35(3):443–447. doi: 10.1007/s10877-020-00507-w

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© Springer Nature B.V. 2020

This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.

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Fig. 1 — a Ambu AuraFlex with corrugated connector; b LMA Classic with straight corrugated connector; c1 LMA ProSeal with angle connector; c2 LMA ProSeal with corrugated connector; d1 LMA Supreme with angle connector; d2 LMA Supreme with corrugated connector; e1 Ambu AuraGain with angle connector; e2 Ambu AuraGain with corrugated connector; f1 LMA Protector with angle connector; f2 LMA Protector with corrugated connector; g1 I-gel with angled connector; g2 I-gel with straight corrugated connector