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. 2017 Nov 14;104(11):921–927. doi: 10.1136/heartjnl-2017-311846

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Map of the number of CT coronary angiography-capable scanners per hundred thousand population by health region in the UK (green = 0.66 to 1.00; amber = 0.33 to 0.66; red = 0 to 0.33).