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  Indian J Med Microbiol
 

Figure 4 : Comparison of risk ratios of different types of graft between the period when antegrade crystalloid cardioplegia was used (1984-1991) and the period when combined antegrade/retrograde blood cardioplegia was used (1992-1999).

Figure 4 : Comparison of risk ratios of different types of graft between the period when antegrade crystalloid cardioplegia was used (1984-1991) and the period when combined antegrade/retrograde blood cardioplegia was used (1992-1999).