▁early ▁ 1 9 5 0 s ); ▁often ▁the ▁pattern ▁was ▁that ▁a ▁trip ▁abroad ▁for ▁work ▁or ▁medical ▁treatment ▁was ▁transformed ▁into ▁permanent ▁ex ile . ▁In ▁the ▁same ▁year , ▁Gr ig oren ko ▁became ▁a ▁U . S . ▁citiz en . ▁ ▁Being ▁in ▁USA ▁since ▁ 1 9 7 7 , ▁Gr ig oren ko ▁took ▁an ▁active ▁part ▁in ▁the ▁activities ▁of ▁the ▁Ukrain ian ▁Hels ink i ▁Group ▁foreign ▁affili ate . ▁On ▁ 2 3 ▁July ▁ 1 9 7 8 , ▁Gr ig oren ko ▁made ▁a ▁statement ▁condem ning ▁the ▁tri als ▁of ▁Soviet ▁diss idents ▁An atol y ▁Sh char ans ky , ▁Aleks andr ▁G in zburg ▁and ▁Vik tor as ▁Pet k us . ▁ ▁In ▁ 1 9 7 9 ▁in ▁New ▁York , ▁Gr ig oren ko ▁was ▁exam ined ▁by ▁the ▁team ▁of ▁psych olog ists ▁and ▁psych iat rist s ▁including ▁Alan ▁A . ▁Stone , ▁the ▁then ▁President ▁of ▁American ▁Psych iat ric ▁Association . ▁The ▁team ▁could ▁find ▁no ▁evidence ▁of ▁mental ▁disease ▁in ▁Gr ig oren ko ▁and ▁his ▁history ▁consistent ▁with ▁mental ▁disease ▁in ▁the ▁past . ▁Their ▁find ings ▁were ▁drawn ▁up ▁and ▁public ized ▁by ▁Walter ▁Reich . ▁Gr ig oren ko ' s ▁case ▁confirmed ▁accus ations , ▁Stone ▁wrote , ▁that ▁psych iat ry ▁in ▁the ▁Soviet ▁Union ▁was ▁at ▁times ▁a ▁tool ▁of ▁political ▁repr ession . ▁ ▁Pet ro ▁Gr ig oren ko ▁described ▁his