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none, none. “Calendar”. Global Heart 3, no. 4 (2008): 9–10. DOI: http://doi.org/10.1016/S1875-4570(08)00095-8

none, none. “Calendar”. Global Heart, vol. 3, no. 4, 2008, pp. 9–0. DOI: http://doi.org/10.1016/S1875-4570(08)00095-8