Generation of transgene-free lung disease-specific human induced pluripotent stem cells using a single excisable lentiviral stem cell cassette http://murphylaboratory.com/wp-content/uploads/2022/06/Generation-of-Transgene-Free-Lung-Disease-Specific-Human-Induced-Pluripotent-Stem-Cells-Using-a-Single-Excisable-Lentiviral-Stem-Cell-Cassette.pdf