How to abbreviate Perineural Invasion?

The ways to abbreviate Perineural Invasion.

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Perineural Invasion
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APASmart Define. (2017). perineural invasion. Retrieved September 26, 2026, from http://smartdefine.org/perineural_invasion/abbreviations/a
ChicagoSmart Define. 2017. "perineural invasion" http://smartdefine.org/perineural_invasion/abbreviations/a (accessed September 26, 2026).
HarvardSmart Define 2017, perineural invasion, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/perineural_invasion/abbreviations/a>.
MLASmart Define. "perineural invasion" 1 December 2017. Web. 26 September 2026. <http://smartdefine.org/perineural_invasion/abbreviations/a>