Archimedes seeks to assist practising clinicians by providing “evidence based” answers to common questions that are not at the forefront of research but are at the core of practice (format adapted from BestBETs published in the EmergencyMedicine Journal). A full description of the format is available online at http://adc.bmj.com/ifora/archimedes.dtl.

Readers wishing to submit their own questions—with best evidence answers—are encouraged to review those already proposed at www.bestbets.org. If your question still hasn’t been answered, …