209However, the persistence of a situation in which Cordial has only one supplier depends on a decision made by producers of PVAs, particularly Chinese exporters of such products, and not on external factors which are imposed on them (see, to that effect, judgment of 14 March 1990, Nashua Corporation and Others v Commission and Council, C‑133/87 and C‑150/87, EU:C:1990:115, paragraphs 40 and 41).