Nitiyanant, P., Pitiguagool, V., Suchato, C. and Varatorn, R. 2018. Diffuse pulmonary neuroendocrine cell hyperplasia with tumorlets and elevated serum CEA. The Bangkok Medical Journal. 1, 1 (Feb. 2018), 21. DOI:https://doi.org/10.31524/bkkmedj.2011.02.005.