Associations have been found between self-reported cold symptoms and Pi type in 84 pairs of identical twins. The risk of cold symptoms relative to MM phenotypes was 1.2 times greater in MS and 2.5 times greater in MZ individuals. Up to 9% of variance in cold symptoms could be attributed to Pi type, representing at least 20% of the total genetical variance.

BACKGROUND Alpha-1 antitrypsin deficiency is under-recognized. We hypothesized that respiratory therapists (RTs) could help improve the detection rate of individuals with alpha-1 antitrypsin deficiency. The American Association for Respiratory Care (AARC) and Alpha-1 Foundation recently collaborated to create an online alpha-1 antitrypsin deficiency training program for RTs. This study aimed to...