Because space matters: conceptual framework to help distinguish slum from non-slum urban areas - Lilford, Richard; Kyobutungi, Catherine; Ndugwa, Robert; Sartori, Jo; Watson, Samuel I; Sliuzas, Richard; Kuffer, Monika; Hofer, Timothy; Albuquerque, João Porto de; Ezeh, Alex (BMJ Global Health, 2019)