Aetiology and outcome of non-traumatic coma in African children: protocol for a systematic review and meta-analysis by Ray, STJ, Fuller, C, Boubour, A, Bonnett, LJ, Lalloo, DG, Seydel, KB, Griffiths, MJ

External validation of clinical prediction models: simulation-based sample size calculations were more reliable than rules-of-thumb by Snell, KIE, Archer, L, Ensor, J, Bonnett, LJ, Debray, TPA, Phillips, B, Collins, GS, Riley, RD

Evaluation of clinical prediction models (part 2): how to undertake an external validation study by Riley, RD, Archer, L, Snell, KIE, Ensor, J, Dhiman, P, Martin, GP, Bonnett, LJ, Collins, GS