Disclaimer: The information included on this site is based on the best available evidence. It has been independently researched, written and reviewed by Dietitians of Canada to assist practitioners to make practice decisions. It should be used to complement, not replace sound clinical judgment. While every effort is made to ensure information contained on this website is accurate and up to date, errors may occasionally occur. Dietitians of Canada, The British Dietetic Association, the Dietitians Association of Australia and Dietitians of New Zealand assume no responsibility or liability arising from any error in or omission of information, or from the use of any information or advice contained within this website or provided by your health care professional. Because PEN® content is updated regularly, printed web pages or PDF documents may become obsolete. PEN® users should ensure that they are referring to the most recent version available. The PEN® website may contain links to other external websites which do not fall under the pennutrition.com domain. Pennutrition.com is not responsible for the privacy practices or the content of such external websites. Dietitians of Canada does not endorse the content, products or services on other websites. All PEN® authors and reviewers are required to complete a Declaration of Affiliations and Interests Form that is kept on file with Dietitians of Canada. Reviewed: 2013