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Philpott, C., et al. “Timing of Tracheostomy in Adult Patients [1] Multiple Letters.” British Medical Journal, vol. 331, no. 7513, 2016, pp. 404–05.

Philpott, C, A Bennett, P Tassone, M Schultz, D Veelo, P Spronk, J Young, J Griffiths, V Barber, and L Morgan. 2016. “Timing of Tracheostomy in Adult Patients [1] Multiple Letters.” British Medical Journal 331 (7513): 404–5.