As part of our 2020 Vision Series reviewing the most seminal papers in JNNP's past Prof Niall Quinn, joins Colin Mahoney to discuss his 1989 paper which provided the first clinical criteria for MSA. He discusses how the last 30 years of science has shaped this original work, and he also shares his experiences of his mentor Prof David Marsden who previously served as the editor of JNNP. https://jnnp.bmj.com/content/91/1/3