68Lastly, it should also be noted that, in the sphere of measures to protect trade, the institutions enjoy a wide discretion by reason of the complexity of the economic, political and legal situations which they have to examine (see judgment of 23 September 2009, Dongguan Nanzha Leco Stationery v Council, T‑296/06, not published, EU:T:2009:347, paragraph 40 and the case-law cited). Consequently, review by the EU Courts of assessments made by the institutions must be limited to establishing whether the relevant procedural rules have been complied with, whether the facts on which the contested choice is based have been accurately stated and whether there has been a manifest error of assessment of those facts or a misuse of power (see judgments of 28 October 2004, Shanghai Teraoka Electronic v Council, T‑35/01, EU:T:2004:317, paragraphs 48 and 49 and the case-law cited, and of 4 October 2006, Moser Baer India v Council, T‑300/03, EU:T:2006:289, paragraph 28 and the case-law cited). That limited judicial review covers, in particular, the choice between the different methods of calculating the dumping margin and the assessment of the normal value of a product (see judgment of 23 September 2009, Dongguan Nanzha Leco Stationery v Council, T‑296/06, not published, EU:T:2009:347, paragraph 41 and the case-law cited).