https://www.thelancet.com/action/showPdf?pii=S1473-3099%2821%2900648-4
https://pages.rts.ch/la-1ere/programmes/cqfd/04-01-2021#11841150
https://www.ceps.eu/system/files/CEPS%20-%20LINKEDIN%20study%20FINAL.pdf
https://www.cps.org.uk/files/reports/original/201001000814-CPSUPWARDLYMOBILE2.pdf