Some suggested that his sickness could have been caused by metal oxidation from the bullets that were lodged in his body from the 1918 assassination attempt; in April 1922 he underwent a surgical operation to remove them.
Beberapa dokter menduga bahwa penyakitnya disebabkan oleh oksidasi logam peluru-peluru yang bersarang di tubuhnya sejak upaya pembunuhan pada tahun 1918; pada April 1922 ia dioperasi untuk mengeluarkan peluru-peluru tersebut.