This
website if very useful if you are in interested in
conducting some research. It has a very good section which
explains what research is, and discusses the difference
between case studies, Cohort studies, surveys, clinical
trials and systemic reviews
The
BMJ is an international peer reviewed medical journal and a
fully 'online first' publication. All the BMJ's original
research is published in full on their website with open
access.
An
independent research funding charity that aims to improve
human health. You can also access their recent publications
and historical and modern books.