Exploring the use of solid fuels for cooking and household air pollution in informal settlements through photovoice: The Fuel to Pot study in Ndirande (Malawi) and Mukuru (Kenya) - Isabelle Uny; Tracy Chasima; Line Caes; Lusizi Kambalame; Moses V. M. Chamba; Limbani Kalumbi; Fred Orina; Heather Price; Sian Lucas; Maria Nyikuri; Sean Semple; Hellen Meme (PLoS ONE)