Suttinont, Panthep, and Usanee Nakphong. 2009. “Optimal Level of Sections for Definite Diagnosis in Transbronchial Biopsy and Pleural Biopsy Specimens”. Siriraj Medical Journal 61 (3):123-25. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246592.