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Fernandez E, Porta M, Alonso J, Antó JM.Fernandez E, et al. Among authors: anto jm.Int J Epidemiol. 1992 Oct;21(5):959-65. doi: 10.1093/ije/21.5.959.Int J Epidemiol. 1992.PMID: 1468860
Ruigómez A, Alonso J, Antó JM.Ruigómez A, et al. Among authors: anto jm.Gac Sanit. 1991 May-Jun;5(24):117-24. doi: 10.1016/s0213-9111(91)71057-1.Gac Sanit. 1991.PMID: 1917329Free article.Spanish.
Ruigómez A, Alonso J, Antó JM.Ruigómez A, et al. Among authors: anto jm.Age Ageing. 1995 Mar;24(2):113-9. doi: 10.1093/ageing/24.2.113.Age Ageing. 1995.PMID: 7793332