You skipped this part: >Unfortunately, Switzerland was not part of this project for several reasons. Firstly, most blood establishments in Switzerland record neither the ethnic background nor the country of birth of their donors. Secondly, antigen genotype analyses are not routinely performed predominantly due to the high costs involved. Thirdly, and probably most influentially, the general awareness of immigration-related blood supply issues outlined above has only developed and gained momentum somewhat recently. Given Switzerland has a long immigration history, this is quite surprising. Why did you cherry pick Switzerland?