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Editorial

Nature Reviews Cardiology 4, 59 (1 February 2007) | doi:10.1038/ncpcardio0796

AHA/ACC/ESC 2006 atrial fibrillation guidelines: looking towards the future

Bernard J Gersh & Douglas Packer

An old proverb states that “if it looks like a duck, quacks like a duck, and swims like a duck—then it probably is a duck”. Nonetheless, there are many species of duck, and they come in different sizes and colors, and occupy various habitats.