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Nieto L, de Diego A, Perpiñá M, Compte L, Garrigues V, Martínez E, Ponce J.Nieto L, et al.Respir Med. 2003 Apr;97(4):393-400. doi: 10.1053/rmed.2002.1460.Respir Med. 2003.PMID: 12693800Free article.Clinical Trial.
Ponce J, Garrigues V, Nos P, García E, Siles S, del Val A.Ponce J, et al.Rev Esp Enferm Dig. 1993 Jan;83(1):1-4.Rev Esp Enferm Dig. 1993.PMID: 8452698Spanish.
Del Val A, Garrrigues V, Ponce J, Berenguer J.Del Val A, et al.Rev Esp Enferm Dig. 1995 Dec;87(12):859-64.Rev Esp Enferm Dig. 1995.PMID: 8562191Spanish.