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Saez M, Tobias A, Muñoz P, Campbell MJ.Saez M, et al. Among authors: tobias a.Stat Med. 1999 Aug 30;18(16):2077-86. doi: 10.1002/(sici)1097-0258(19990830)18:16<2077::aid-sim185>3.0.co;2-t.Stat Med. 1999.PMID: 10441764
Figueiras A, Saez M, Tobias A.Figueiras A, et al. Among authors: tobias a.Gac Sanit. 1999 Sep-Oct;13(5):417-8. doi: 10.1016/s0213-9111(99)71397-x.Gac Sanit. 1999.PMID: 10681201Free article.Spanish.No abstract available.