|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||8 days ago||28.33||$21.31||You save $7.02|
|Amazon US||8 days ago||21.6||$21.31||You save $0.29|
Paula M. De Angelis is a scientific researcher and consultant. She received her PhD from the University of Oslo and has worked in academic research settings for the past thirty years in both Norway and the USA.