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Olfactory system cartoon

Cartoon of the olfactory system by Santiago Ramón y Cajal (1894). (Source: Instituto Cajal, Madrid, Spain. Figueres-Oñate M, Gutiérrez Y, López-Mascaraque L. Unraveling Cajal's view of the olfactory system. Front Neuroanat 2014;8:55. Creative Commons Attribution [CC BY] license, creativecommons.org/licenses/by/4.0.)

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