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van den Bosch JE, Kalkman CJ, Vergouwe Y, Van Klei WA, Bonsel GJ, Grobbee DE, Moons KG.van den Bosch JE, et al. Among authors: kalkman cj.Anaesthesia. 2005 Apr;60(4):323-31. doi: 10.1111/j.1365-2044.2005.04121.x.Anaesthesia. 2005.PMID: 15766334Free article.