This document discusses a case study of three families - a white American family, Sudanese family, and Vietnamese family - visiting a sleep clinic. The doctor, Dr. Williams, treats the families differently based on their race, ethnicity, culture, and socioeconomic status. He is most comfortable with and provides the best treatment to the white American family. However, he makes assumptions about the Sudanese family's background and insurance status that leads him to turn them away without proper treatment. He also does not understand the Vietnamese family's culture, providing treatment contrary to their expectations. The document argues that factors like cultural diversity, health literacy, and a provider's perceptions can influence disparities in health outcomes between patients.