{Reference Type}: Journal Article {Title}: Waxing and Waning Cysts and Nodules. {Author}: Zhang T;Peng M;Chang X;Shi J; {Journal}: Am J Respir Crit Care Med {Volume}: 208 {Issue}: 1 {Year}: 07 2023 1 {Factor}: 30.528 {DOI}: 10.1164/rccm.202109-2196IM