B. Thapa, R. Sapkota, K. Shrestha, P. Sayami, and G. Sayami, “Transbronchial needle aspiration cytology of endobronchial abnormalities: does it increase the positivity rates of bronchoscopy”, J Pathol Nep, vol. 4, no. 7, pp. 565–569, Apr. 2014.