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In the USA the right to receive informed consent wasn't expressed until 1957 when the California Supreme Court introduced the theory in the case ( ) a patient who had a problem with blood circulation in his leg.
この文章の( )に入る語なのですが、
1) involved
2) involving in
3) which was involved
4) which involved
のどれなのでしょうか?
4)のような気がするのですが、1)との違いがいまいち分かりません。よろしくご教示ください。
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