C. Rittidet, N. Chaiear, P. Tumsatan, P. Domthong, W. Sukkasem, and P. S. Burge, “Proportion of occupational progressive fibrosing interstitial lung disease in the tertiary hospitals of Thailand”, Asia Pac J Sci Technol, vol. 26, no. 04, pp. APST–26, Aug. 2021.