The only empirical study I know of is the Dannish one: https://www.acpjournals.org/doi/10.7326/M20-6817 https://www.acpjournals.org/doi/10.7326/M20-6817 I thou

The only empirical study I know of is the Dannish one: https://www.acpjournals.org/doi/10.7326/M20-6817 https://www.acpjournals.org/doi/10.7326/M20-6817 I thought that the effect would be like 80-90% or something. But given what was established practice in january last year I should not be too suprised with the results ...