Source: Canadian Agency for Drugs and Technologies in Health (CADTH),
Date published: 18/04/2012

Source: NPC,
Date published: 20/03/2012

Source: Cochrane,
Date published: 01/02/2012

Source: Diabetic Medicine,
Date published: 19/01/2012

Source: Applied Health Economics and Health Policy,
Date published: 07/11/2011

Source: Diabetic Medicine,
Date published: 20/09/2011

Source: Cochrane Library,
Date published: 11/07/2011

Source: MHRA,
Date published: 13/05/2011

Source: Regional Drug and Therapeutics Centre,
Date published: 06/04/2011
Review date: 30/04/2013

Source: Diabetes Care,
Date published: 21/02/2011