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. 2022 Feb 13;14(4):934. doi: 10.3390/cancers14040934

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Kaplan–Meier curve for different NPI classes in the studied samples: (A) NPI Level I samples; (B) NPI Level II samples; (C) NPI Level III samples; (D) NPI Level IV samples.