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British Microcirculation Society advancing the study of circulation of the blood and other tissue fluids especially, though not exclusively, in the small vessels and of matters relating thereto. http://www.microcirculation.org.uk/
Microcirculation.ca dedicated to the study of the microcirculation and associated microvascular pathophysiology with intravital video microscopy. http://www.microcirculation.ca/
Microcirculatory Society, Inc. encourages the exchange and dissemination of information on the microcirculation. http://microcirc.org/