I want to know the answer to the following question:
What year did the Neuropsychopharmacology journal publist a study about the effect on the brain of beers flavor?
All the background I'm provided with is that "A study published in the Neuropsychopharmacology journal in 2013 revealed the finding that the flavour of beer alone could provoke dopamine activity in the brain of the male participants, who wanted to drink more as a result.". Is that enough to answer the question?
Answer: yes