“…As such, these groups can provide dynamic, collaborative, information-rich environments where users can extend their personal networks by joining wider, potentially heterogeneous communities of strangers [1,5,9,10]. Several studies suggest that Facebook empowers various social groups (such as e.g., parents, college students, and people with chronic illnesses) by providing private spaces to seek and provide information and support on topics that are deemed to be inappropriate or stigmatizing to share with one's close networks [3,4,[6][7][8][10][11][12][13][14][15][16][17]. Members of Facebook groups can disclose and discuss information with people with whom they have no preexisting or long-term relationships, which may be considered less costly than doing so with their close social circles [7,8,12,13].…”