Figure 1.

Pictures from Tom Isaacs’ Star Wars themed talk at the World Parkinson Congress, Portland, OR, USA, 2016 entitled “Stem cells, what they mean to people with Parkinson's disease”. Tom, depicted as Darth Vader, used these images to illustrate “a kind of Stem Cell Wars in which stem cells can come from either a dodgy source usually combined with far‐fetched and false claims about their efficacy. Or they come from a reliable source like those being studied by the previous speakers here today. So, we need to stand by these scientists, who, hopefully, in the long run will be able to offer us a source of stem cells and therapies which are evidence based”