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Mayol PM, Olmedo LF, Sifontes JE.Mayol PM, et al. Among authors: sifontes je.Bol Asoc Med P R. 1987 Oct;79(10):406-8.Bol Asoc Med P R. 1987.PMID: 3446235No abstract available.
Valcárcel M, Sifontes J, Rivera H, Olmedo L, Vallés L.Valcárcel M, et al.Bol Asoc Med P R. 1983 Oct;75(10):465-8.Bol Asoc Med P R. 1983.PMID: 6416262No abstract available.
Sifontes JE, Rodríguez F, Mayol P, Menéndez R, Alicea E, Vélez W.Sifontes JE, et al.Bol Asoc Med P R. 1977 Aug;69(8):251-7.Bol Asoc Med P R. 1977.PMID: 269731Spanish.No abstract available.
Rivera JF, Rodríguez-Santana JR, Vázquez-Agosto S, Vélez-Vega W, Sifontes JE, Mayol PM.Rivera JF, et al. Among authors: sifontes je.Bol Asoc Med P R. 1990 May;82(5):211-5.Bol Asoc Med P R. 1990.PMID: 2375811
Sifontes JE, Mayol PM, Rodríguez Santana JR, Rivera JF, Vélez W, Vázquez S.Sifontes JE, et al.Bol Asoc Med P R. 1991 Oct;83(10):465-6.Bol Asoc Med P R. 1991.PMID: 1789894Review.Spanish.No abstract available.
Ortega M, Sifontes JE, Rosa O, Mayol PM, Rivera R.Ortega M, et al. Among authors: sifontes je.Bol Asoc Med P R. 1986 Jul;78(7):282-6.Bol Asoc Med P R. 1986.PMID: 3460607No abstract available.
Mayol PM, Sifontes JE, Vázquez S, Rodríguez Santana JR.Mayol PM, et al. Among authors: sifontes je.Bol Asoc Med P R. 1986 Dec;78(12):535-8.Bol Asoc Med P R. 1986.PMID: 3468956No abstract available.
Sifontes JE, Mayol PM, Vélez W, Alicea E, Rodríguez Martínez F, Santana JJ.Sifontes JE, et al.Bol Asoc Med P R. 1980 Sep;72(9):469-84.Bol Asoc Med P R. 1980.PMID: 6932884Spanish.No abstract available.
Sifontes JE, Mayol PM, Fernando Rivera J, Piovanetti I.Sifontes JE, et al.Bol Asoc Med P R. 1982 Apr;74(4):113-22.Bol Asoc Med P R. 1982.PMID: 6960897Spanish.No abstract available.