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Ferrer C, Garcia-Esteban R, Mendez M, Romieu I, Torrent M, Sunyer J. Social determinants of dietary patterns during pregnancy. Gac Sanit. 2009 Jan;23(1):38-43. doi: 10.1016/j.gaceta.2008.05.004
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Bonfill X, Roura P, Moreno C, Rivero E, Rué M. Cancer mortality in the counties of Catalonia, Spain (1983-1989). Gac Sanit. 1997 Feb;11(2):74-82.
Portella E, Rivero E, Carrillo E, Colom D, Murillo C, Murillo J. Influence of municipal registry errors on the identification of a sample. Gac Sanit. 1991;5(25):183-4.