Do you know your chocolates? Recognition survey among medical staff of various grades | The BMJ

scores for the post-registration house officers were significantly better than scores for the preregistration house officers, registrars, and consultants. In addition, a significant inverse correlation existed between years post registration and total scores for chocolate recognition (Pearson's r=-0.47, P<0.01). The nurses performed as well as the post-registration house officers. 

https://www.bmj.com/content/315/7123/1655

_- Steve