3Kavuru MS, Popovich M. Therapeutic whole lung lavage: a stop2gap therapy for alveolar p roteinosis[ J ]. Chest, 2002, 122 : 1123.
4Van der Maarel-Wierink CD, Vanobbergen JN ,Bronkhorst EM ,et al. Risk factors for aspiration pneumonia in frail older people: a systematic literature review. J Am Med Dir Assoc ,2011 , 12:344-354.