I realise this does not necessarily support my idea, but found it interesting nonetheless:
http://www.bbc.com/news/uk-scotland-34583642
http://www.bbc.com/news/uk-scotland-34583642
The woman who can smell Parkinson's disease
He says: "The first time we tested Joy we recruited six people with Parkinson's and six without.
"We had them wear a t-shirt for a day then retrieved the t-shirts, bagged them and coded them.
"Her job was to tell us who had Parkinson's and who didn't.
"Her accuracy was 11 out of 12. We were quite impressed."
Dr Kunath adds: "She got the six Parkinson's but then she was adamant one of the 'control' subjects had Parkinson's.
"But he was in our control group so he didn't have Parkinson's.
"According to him and according to us as well he didn't have Parkinson's.
"But eight months later he informed me that he had been diagnosed with Parkinson's.
"So Joy wasn't correct for 11 out of 12, she was actually 12 out of 12 correct at that time.