Cost-effectiveness of bubble continuous positive airway pressure in treating severe pneumonia and hypoxaemia in under-five children in Ethiopia - Abdi Gari Negasa; Firew Tekle Bobo; Meseret Gebre; Tsinuel Nigatu; Mirkuzie Woldie; Mideksa Adugna Koricho; Mohammod J. Chisti; Peter Berman; Girmaye Dinsa (PLoS ONE, 2026)