Reinforce chapter themes with free access to two journal articles for each chapter and further online readings. Select chapters will also include suggested weblinks.

• EThOS makes UK theses (e- and paper-based) more widely available via a ‘one-stop-shop’ by harvesting e-theses from institutional repositories and digitalizing paper theses on demand from researchers (http://www.ethos.ac.uk).
• In terms of evaluation of health interventions, the new Central Portfolio Management System and the public access search for clinical trials are provided from the UK Clinical Trials Gateway website. It gives an overview of the wide range of trials in  the UK (https://www.ukctg.nihr.ac.uk/).