4Gasparini S,Ferretti M,Secchi EB,et al.Integration of transbronchial and Percutaneous approach in the diagnosis of peripheral pulmonary nodule of masses[J].Chest,1995,108:131 ~ 137.
5Westcott JL,Rao N,Colley DP.Transthoracic needle biopsy of small pulmonary nodules[J].Radiology,1997,202:97~ 103.