Lut I, Lewis K, Wijlaars L, Gilbert R, Fitzpatrick T, Lu H, Guttmann A, Goldfield S, Lei S, Gunnlaugsson G, Jónsson SH, Mechtler R, Gissler M, Hjern A, Hardelid P. J Health Serv Res Policy. 2021; 26(4):251-62. Epub 2021 Jul 28. DOI: https://doi.org/10.1177/13558196211012732