He kept his position as chairman of the political committee of the United Nations Association, but in 1985 the progression of Parkinson's disease, which had first been diagnosed in 1979, led to the curtailment of most of his public activity.
彼は国際連合協会（英語版）政治委員会（英: the political committee）委員長職にあったが、1979年に初めてパーキンソン病の診断を受け、1985年には病の進行から、公職に当たる時間の大半を短縮せざるを得なくなっていた。