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Idiopathic pulmonary fibrosis (an update) and progressive pulmonary fibrosis in adults: an official ATS\/ERS\/JRS\/ALAT clinical practice guideline. Am J Respir Crit Care Med 205: e18-e47, 2022.","DOI":"10.1164\/rccm.202202-0399ST"},{"key":"8","doi-asserted-by":"crossref","unstructured":"8. Inomata M, Kuse N, Awano N, et al. Prospective multicentre study on the safety and utility of transbronchial lung cryobiopsy with endobronchial balloon. ERJ Open Res 6: 00008-2020, 2020.","DOI":"10.1183\/23120541.00008-2020"},{"key":"9","doi-asserted-by":"crossref","unstructured":"9. Patterson KC, Shah RJ, Porteous MK, et al. Interstitial lung disease in the elderly. Chest 151: 838-844, 2017.","DOI":"10.1016\/j.chest.2016.11.003"},{"key":"10","doi-asserted-by":"publisher","unstructured":"10. Du Rand IA, Blaikley J, Booton R, et al. British Thoracic Society guideline for diagnostic flexible bronchoscopy in adults: accredited by NICE. 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