Determinants of longitudinal changes in spirometric function among swine confinement operators and farmers.
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D. Schwartz | L. Burmeister | K. Donham | S. Olenchock | J. Merchant | W. Popendorf | D. V. Van Fossen | D A Schwartz | K J Donham | S A Olenchock | W J Popendorf | D. Van Fossen | L F Burmeister | J A Merchant | S. A. Olenchock | J. A. Merchant