Fish oils:
http://www.bbc.co.uk/science/humanbody/mind/articles/intelligenceandmemory/omega_three.shtml
http://news.bbc.co.uk/1/hi/england/6991528.stm

Fish oil makes children smarter, study claims https://www.telegraph.co.uk/news/health/3083228/Fish-oil-makes-children-smarter-study-claims.html

two studies in UK DOLAB 1 and 2

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0043909
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0192909

https://theconversation.com/half-of-biomedical-research-studies-dont-stand-up-to-scrutiny-and-what-we-need-to-do-about-that-45149

Click to access 56314e40aac61.pdf

adaptive trials:

review

https://academic.oup.com/jnci/article-abstract/109/6/djx013/3074379?redirectedFrom=fulltext
https://academic.oup.com/jnci/article-abstract/109/6/djx013/3074379?redirectedFrom=fulltext
https://clinicaltrials.gov/ct2/show/NCT01042379

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4706669/

https://www.ncbi.nlm.nih.gov/pubmed/20595245/
https://www.ncbi.nlm.nih.gov/pubmed/25475878