Complex sentence: From 1960 until his retirement, in 1974, he was Professor & Chairman of neurosurgery at the Karolinska Institute in Stockholm, succeeding Herbert Olivecrona, who was the department's founder in 1920.
Split into simpler sentences: From 1960 until his retirement, in 1974, he was Professor & Chairman of Neurosurgery at the Karolinska Institute in Stockholm. Succeeding Herbert Olivecrona, who was the department's founder in 1920.