| http://www.w3.org/ns/prov#value | - Of the five studies with pregabalin, three studies were conducted in the US (Arnold 2008; Crofford 2005; Mease 2008), one study in Japan (Ohta 2012), and one study included countries all over the world except for the US (Europe, Middle America, Australia, Canada, India and Korea) (Pauer 2011).
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