Interesting piece from ProPublica.

https://www.propublica.org/article/when-evidence-says-no-but-doctors-say-yes

Fiona Morgan 

Cardiff University / Prifysgol Caerdydd

Systematic Reviewer, SURE - University Library Service / Adolygydd Systematig, SURE -

Lecturer - School of Healthcare Sciences / Darlithydd - Ysgol Gwyddorau Gofal Iechyd

Not all evidence is good evidence. Learn to tell the difference via this free online course from Cardiff University: Making Sense of Health Evidence https://www.futurelearn.com/courses/informed-health-consumer