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Smith, Laura-Jane E., Elizabeth Moore, Ifrah Ali, Liam Smeeth, Patrick Stone, و Jennifer K. Quint. "Prognostic Variables and Scores Identifying the End of Life in COPD: A Systematic Review." Int J Chron Obstruct Pulmon Dis 2017.

Smith, Laura-Jane E., et al. "Prognostic Variables and Scores Identifying the End of Life in COPD: A Systematic Review." Int J Chron Obstruct Pulmon Dis 2017.