For this study, the places that homeless people frequent are taken as the locations providing services to meet their needs, as well as the public spaces in which they spend time (De Vitiis et al., Two approaches were instead considered: the first involved selecting individuals at canteens and night shelters (known to be frequented by large numbers of homeless people); the second focused on public spaces. Both approaches had limitations related to incomplete coverage of homeless populations, and to the risk of including people multiple times. Addressing this challenge is more complex for a survey conducted in public spaces, however.