It's in that spirit that we reassessed our list of the 25 most head-turning college campuses in the country, in the process switching out some otherwise deserving notables (sorry Columbia) for some even better looking, heretofore overlooked gems.
The Global Initiative for Chronic Obstructive Lung Disease (GOLD) defines COPD as follows: Chronic obstructive pulmonary disease (COPD) is a common, preventable, and treatable disease that is characterized by persistent respiratory symptoms and airflow limitation that is due to airway and/or alveolar abnormalities usually caused by significant exposure to noxious particles or gases.
Gold standard (test) In medicine and statistics, gold standard test usually refers to a diagnostic test or benchmark that is the best available under reasonable conditions. Other times, gold standard is used to refer to the most accurate test possible without restrictions.