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Astley CM, Chew DP, Aylward PE, Molloy DA, De Pasquale CG.Astley CM, et al. Among authors: chew dp.Heart Lung Circ. 2008 Feb;17(1):25-32. doi: 10.1016/j.hlc.2007.04.008. Epub 2007 Jun 5.Heart Lung Circ. 2008.PMID: 17553747Clinical Trial.