Hello Kalosyni, thanks for sharing the link to the 2010 interview with Ludwig Minelli.
I leave you a link to an article on the renowned botanist David Godall, who at 104 chose to end his life by medical suicide at the Basel clinic in Switzerland circa 2013.
Here is the link to the article and video of him speaking:
David Goodall: Scientist, 104, ends his life in Switzerland
The ecologist and botanist, who was not terminally ill, went to Switzerland to voluntarily end his life.
www.bbc.com