I was able to find a little literature for my research proposal at the end year 2, but am now struggling to find 1 relevant piece...
Any good advice on searching for literature?
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I used google scholar. I think medics use pubmed. The best thing is to look at the references of papers you have already read and work from there.
It is also beneficial to make a table of the key results from the papers you have read. This helps summarise everything so you can look back on it later and also helps the reader gain a quick understanding of the relevant papers.