Holly Hartman: App Calculates Risk of Delaying Cancer Care During Pandemic by U of Michigan News published on 2020-05-22T15:16:55Z Holly Hartman, the project’s lead researcher and a doctoral student in biostatistics at U-M’s School of Public Health, discusses the current and future use of the COVID app developed by a team of data scientists and cancer doctors from U-M's Rogel Cancer Center and School of Public Health.