Suttinont, P. ., and U. . Nakphong. “Optimal Level of Sections for Definite Diagnosis in Transbronchial Biopsy and Pleural Biopsy Specimens”. Siriraj Medical Journal, vol. 61, no. 3, May 2009, pp. 123-5, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246592.