A new article has been accepted in the Nederlands Tijdschrift voor Geneeskunde. The article with the title “patient crossover studies” or “case-crossover studies” is an educational in the Methodology series of the Journal. REJR is the first author of this article and she did a great job on explaining the similarities and differences between this observational study design and the experimental version of this within person comparison. These crossover trials have been discussed by TNB en JGvdB in a previous article in the same series on which i wrote earlier.
bob siegerink 