Authors: A J Sandford; T Chagani; T D Weir; J E Connett; N R Anthonisen; P D Paré Journal: Am J Respir Crit Care Med Date: 2001-02 Impact factor: 21.405
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Authors: N R Anthonisen; J E Connett; J P Kiley; M D Altose; W C Bailey; A S Buist; W A Conway; P L Enright; R E Kanner; P O'Hara Journal: JAMA Date: 1994-11-16 Impact factor: 56.272