Cochrane Circulation and Breathing groups

	Cochrane Airways produces systematic reviews on asthma, chronic obstructive pulmonary disease (COPD), bronchiectasis and other lung diseases.
	Cochrane Heart prepares, maintains, and promotes systematic reviews on the effect of interventions for treating ischaemic and all other heart diseases and preventing cardiovascular diseases.
	Cochrane Hypertension's scope includes randomized controlled trials (RCTs) of interventions evaluating blood pressure and clinical outcomes for the prevention and treatment of essential hypertension
	Cochrane Stroke seeks to identify and review all randomised controlled trials (RCTs) and controlled clinical trials (CCTs) of interventions in the primary and secondary prevention of stroke, and the treatment and rehabilitation of stroke patients, including subarachnoid haemorrhage. Primary prevention trials are restricted to those in which stroke is the major outcome of interest, eg carotid surgery for asymptomatic stenosis.
	Cochrane Vascular produce systematic reviews encompassing all surgical and medical interventions for the prevention or treatment of arterial and venous diseases. Topics covered include aortic aneurysm; lower limb arterial occlusive disease, including intermittent claudication and critical limb ischaemia; and venous diseases including varicose veins and thromboembolism.