TOPICS: Restrict lung expansion, extrinsic, intrinsic, scoliosis, morbid obesity, polio, myasthenia gravis, Guillain Barre syndrome, DLCO, A-a gradient, interstitial lung diseases, pneumoconiosis, sarcoidosis, idiopathic pulmonary fibrosis, granulomatosis with polyangiitis, bleomycin, busulfan, methotrexate, amiodarone, hypersensitivity pneumonitis, compliance, alveolar macrophages, type 1 pneumocytes, type 2 pneumocytes, honeycomb lung, hypersensitivity pneumonitis, type III/IV hypersensitivity, farmers, pulmonary function test, total lung capacity, FEV1, FVC, FEV1/FVC ratio, maximal expiratory rate, short shallow breaths, inspiratory crackles, hypertrophic osteoarthropathy, HRCT, fibroblastic foci, corticosteroids, colchicine, lung transplantation