%0 Journal Article %K General Medicine %B The Lancet %D 2021 %G eng %I Elsevier BV %R 10.1016/s0140-6736(21)02219-4 %T Can digital technologies improve health? %U https://www.thelancet.com/action/showPdf?pii=S0140-6736%2821%2902219-4