I don't know under which keyword you could find it on the internet. I was surprised myself that there was no English version available. GEO is a German magazine but they do have international versions in different languages. If I can find this article in English, I'll let you know.
For direct search I would go to the next (university) library with access to an online scientific (medical/biological) journal catalogue and look directly for the authors. If you live in a city with an university this might be faster and more satisfying.