“…Demographic changes, including lower rates of marriage, higher rates of childlessness, and increased mobility, affect who might be available to help care for patients at end-of-life (Cherlin, 2010;Hayford, 2013). Nonfamily informal social network members are increasingly likely to play a role in the care and support a primary caregiver given the variations that exist in the roles and relationships among the people who comprise caregivers' support systems (Gunn et al, 2017). Social networks are, therefore, increasingly diverse in their composition, both in terms of family and non-family memberships, and social network composition can change over the life course and in response to stressors (Benson et al, 2020;Girardin et al, 2018).…”