The French Academy of Medicine recommends that large wind turbines be installed no closer than 1.5 kilometers (about 1 mile) from any residence. The document is in French. See a translation of a report of the study in “Panorama du medicine” at the Kirby Mountain blog [1].
Download original document: “Le retentissement du fonctionnement des éoliennes sur la santé de l’homme [2]”