γὰρ τὴν τοῦ ἥπατος φύσιν ἐπίκαιρον οὖσαν καὶ ἀναγκαίαν πᾶσι τοῖς ἐναίμοις ζῴοις αἰτίαν εἶναι, ποιάν τινʼ οὖσαν, τού ζῆν ἐλάττω πλείω χρόνον.
De partibus animalium. Aristotle. ed. Bernhard Langkavel. United States. 2016.
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