I don't know why people keep repeating this myth. Laws like these are old as dirt. It could as well have been about blood samples from Denmark used in research in the US: the samples are protected by Danish law and to use them in the US you have to agree to certain rules. Again an example of you saying you will follow certain rules to be allowed to transport and use the samples outside Denmark, not Denmark forcing their laws on anything in another country. You are free to not sign anything and not use or move the blood samples or PII anywhere.