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Best evidence topic reports (BETs) summarise the evidence pertaining to particular clinical questions. They are not systematic reviews, but rather contain the best (highest level) evidence that can be practically obtained by busy practising clinicians. The search strategies used to find the best evidence are reported in detail in order to allow clinicians to update searches whenever necessary. Each BET is based on a clinical scenario and ends with a clinical bottom line that indicates, in the light of the evidence found, what the reporting clinician would do if faced with the same scenario again. The BETs published below were first reported at the Critical Appraisal Journal Club at the Manchester Royal Infirmary1 or placed on the BestBETs web site. Each BET has been constructed in the four stages that have been described elsewhere.2 The BETs shown here together with those published previously and those currently under construction can be seen at http://www.bestbets.org.3 Five BETs are included in this issue of the journal, the last of which is negative.
▸ Timing of lumbar puncture in suspected subarachnoid haemorrhage
▸ Proteolytic enzymes for oesophageal meat impaction
▸ Effervescent agents for oesophageal food bolus impaction
▸ Humeral fractures and non-accidental injury in children
▸ Torn frenulum and non-accidental injury in children