Impact of out-of-pocket expenses on children with cancer in Tanzania: A mixed-methods economic study - Emily R. Smith; Pamela Espinoza; Happiness D. Kajoka; Henry E. Rice; Madeline Metcalf; Anna Tupetz; Cesia Cotache-Condor; Blandina T. Mmbaga; Catherine Staton; Esther Majaliwa (PLoS ONE, 2025)