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van den Bosch JE, Bonsel GJ, Moons KG, Kalkman CJ.van den Bosch JE, et al. Among authors: kalkman cj.Anesthesiology. 2006 May;104(5):1033-9. doi: 10.1097/00000542-200605000-00020.Anesthesiology. 2006.PMID: 16645456Free article.Clinical Trial.
Kalkman CJ, Peelen L, Moons KG, Veenhuizen M, Bruens M, Sinnema G, de Jong TP.Kalkman CJ, et al.Anesthesiology. 2009 Apr;110(4):805-12. doi: 10.1097/ALN.0b013e31819c7124.Anesthesiology. 2009.PMID: 19293699Free article.