Κοντινό πλάνο του ερευνητή κρατώντας φάρμακα, ενώ κάθεται στο τραπέζι με μικροσκόπιο και δοκιμαστικούς σωλήνες φωτογραφία αρχείου - Φωτογραφίες & Εικόνες Αρχείου

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