A computational infrastructure to underpin complex clinical trials and medical
population studies is highly desirable. This should allow access to a range of
distributed clinical data sets; support the efficient processing and analysis of
the data obtained; have security at its heart; and ensure that authorized
individuals are able to see privileged data and no more. Each clinical trial has
its own requirements on data sets and how they are used; hence a reusable and
flexible framework offers many advantages. The MRC funded Virtual Organisations
for Trials and Epidemiological Studies (VOTES) is a collaborative project
involving several UK universities specifically to explore this space. This
article presents the experiences of developing the Scottish component of this
nationwide infrastructure, by the National e-Science Centre (NeSC) based at the
University of Glasgow, and the issues inherent in accessing and using the
clinical data sets in a flexible, dynamic and secure manner.