Jacob studied at Gadjah Mada University's School of Medicine from 1950 to 1956; University of Arizona from 1957 to 1958; Howard University from 1958 to 1960, and finally Utrecht University, where he completed his doctorate in anthropology in 1967 [REF].
Jacob died in Dr. Sardjito Hospital at the age of 77 after suffering from a debilitating liver disease [REF].