History, 19th Century History, 20th Century 10 Colonialism 7 History 5 history 5 Medicine 4 Public health 4 Social medicine 4 Ethnic Groups 3 Public Health 3 Social Environment 3 Delivery of Health Care 2 Health Policy 2 Mental Health Services 2 Public Health Administration 2 Sexual Behavior 2 Animal Husbandry 1 Cattle 1 Disorders of Sex Development 1 Eugenics 1 Gender Identity 1 Gender identity 1 Genetics 1 Health promotion 1 History of Nursing 1 History, 18th Century 1 Hospitals 1 Intersexuality 1 Livestock 1 Manners and customs 1