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From the Division of Pulmonary & Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pa. Dr Benzo is supported by Grant No. 5k23CA106544 from the National Cancer Institute. Dr Benzo has no conflict of interests. Address correspondence to: Roberto P. Benzo, MD, MSc, Division of Pulmonary and Critical Care Medicine, University of Pittsburgh, Suite 1211 Kaufmann Building, 3471 Fifth Avenue, Pittsburgh, PA 15213 (e-mail: [email protected]).
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Roberto P. Benzo (2007) studied this question.
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