Spirometry use in patients with sickle cell disease with and without asthma and acute chest syndrome: A multicenter study oleh Laurie Duckworth, Lucien Vandy Black, Dima Ezmigna, Jeanette Green, Yingwei Yao, Shaun Grannis, Jeff Klann, Reuben Applegate, Gigi Lipori, Tanya Wallace, Diana J. Wilkie