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APA Citation
Sitzwohl, C., Langheinrich, A., Schober, A., Krafft, P., Sessler, D. I., Herkner, H., Gonano, C., Weinstabl, C., & Kettner, S. C. (2010). endobronchial intubation detected by insertion depth of endotracheal tube, bilateral auscultation, or observation of chest movements: randomised trial. BMJ, 341, . http://access.bl.uk/ark:/81055/vdc_100144726459.0x00002d