As a final note, I would like to share a few thoughts about the principles of research. I do not believe that there is just one single path for science. Everyone has their own approach, and mine has not been linear, but composed of opportunities, luck, and failures in equal measure. If you want to discover something completely new, you have to be in a state of uncertainty. It is, however, crucial to have general guidelines in an important area of research, to pick problems worth solving, and to find the right people to work with. Another key ingredient is...

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