Cited 11 times since 2015 (1.2 per year) source: EuropePMC American journal of respiratory and critical care medicine, Volume 192, Issue 1, 1 1 2015, Pages 114-116 Relationship between Change in Lung Density and Long-Term Progression of Lung Function. Stolk J, Stockley RA, Piitulainen E, Stoel BC