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Wohllk N, Becker P, Youlton R, Cote GJ, Gagel RF.Wohllk N, et al. Among authors: becker p.Rev Med Chil. 2001 Jul;129(7):713-8.Rev Med Chil. 2001.PMID: 11552438Spanish.
Wohllk N, Becker P, Véliz J, Pineda G.Wohllk N, et al. Among authors: becker p.Rev Med Chil. 2000 Jul;128(7):791-800.Rev Med Chil. 2000.PMID: 11050843Review.Spanish.
Csendes A, Becker P, Valenzuela J, Braghetto I, Csendes P.Csendes A, et al. Among authors: becker p.Rev Med Chil. 1991 Jan;119(1):38-44.Rev Med Chil. 1991.PMID: 1824142Spanish.
Csendes A, Valenzuela J, Becker P, Arraztoa JA, Medina E.Csendes A, et al. Among authors: becker p.Rev Med Chil. 1989 Feb;117(2):146-9.Rev Med Chil. 1989.PMID: 2487952Spanish.
Pineda G, Becker P, Atria A, Aguayo J.Pineda G, et al. Among authors: becker p.Rev Med Chil. 1989 Apr;117(4):367-72.Rev Med Chil. 1989.PMID: 2519389Spanish.
Becker P, Pineda G, Silva E, Salinas R, Briceño A, Astorga V.Becker P, et al.Rev Med Chil. 1982 Feb;110(2):114-8.Rev Med Chil. 1982.PMID: 7156557Spanish.No abstract available.
Baeza A, Becker P, Pineda G.Baeza A, et al. Among authors: becker p.Rev Med Chil. 1987 Oct;115(10):936-41.Rev Med Chil. 1987.PMID: 3506255Spanish.No abstract available.