 Ferenczi's work has strongly influenced theory and praxis of the interpersonal-relational theory of American psychoanalysis, as typified by psychoanalysts at the William Alanson White Institute.Ferenczi was president of the International Psychoanalytical Association from 1918 to 1919.Ernest Jones, a biographer of Freud, termed Ferenczi as "mentally ill" at the end of his life, famously ignoring Ferenczi's struggle with pernicious anemia, which killed him in 1933.