Hans is currently engaged in a research project on the history of medicine in the Dutch East Indies and Indonesia. He currently focuses on the roles Indonesian physicians have played in the social, cultural, and political movements in the Dutch East Indies and Indonesia in the 1950s. He is also researching the nature of Indonesian herbal medicine or jamu and the way it relates to modern medicine.
Hans has a special interest in the history of psychiatry. He has published on the history of the American mental hygiene movement, the treatment of war neurosis in the armed forces of Australia, the UK, and the USA during World War II, and the history of colonial psychiatry.
