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Kosmala W, Spring A, Witkowska M.Kosmala W, et al. Among authors: spring a.Pol Arch Med Wewn. 1997 Nov;98(11):414-23.Pol Arch Med Wewn. 1997.PMID: 9594559Clinical Trial.Polish.
Kosmala W, Spring A.Kosmala W, et al. Among authors: spring a.Pol Merkur Lekarski. 2003 Mar;14(81):216-9.Pol Merkur Lekarski. 2003.PMID: 12914098Polish.
Spring A, Haczyński J, Jołda-Mydłowska B, Witkowska M.Spring A, et al.Pol Arch Med Wewn. 1995 Jul;94(1):47-58.Pol Arch Med Wewn. 1995.PMID: 8524699Clinical Trial.Polish.
Spring A, Kosmala W, Jołda-Mydłowska B, Witkowska M.Spring A, et al.Pol Arch Med Wewn. 1997 Apr;97(4):323-32.Pol Arch Med Wewn. 1997.PMID: 9411409Clinical Trial.Polish.
Witkowska M, Spring A, Kosmala W, Jołda-Mydłowska B.Witkowska M, et al. Among authors: spring a.Pol Arch Med Wewn. 1997 Apr;97(4):333-42.Pol Arch Med Wewn. 1997.PMID: 9411410Clinical Trial.Polish.
Spring A, Jołda-Mydłowska B, Kosmala W, Witkowska M.Spring A, et al.Pol Merkur Lekarski. 1998 Jun;4(24):315-8.Pol Merkur Lekarski. 1998.PMID: 9771014Polish.
Kosmala W, Spring A.Kosmala W, et al. Among authors: spring a.Pol Merkur Lekarski. 1999 Aug;7(38):48-50.Pol Merkur Lekarski. 1999.PMID: 10522415Clinical Trial.Polish.
Kobusiak-Prokopowicz M, Spring A, Jołda-Mydłowska B, Witkowska M.Kobusiak-Prokopowicz M, et al. Among authors: spring a.Pol Arch Med Wewn. 2001 Jul;106(1):557-65.Pol Arch Med Wewn. 2001.PMID: 11928566Polish.
Witkowska M, Spring A.Witkowska M, et al. Among authors: spring a.Kardiol Pol. 1992 Oct;37(10):239-44.Kardiol Pol. 1992.PMID: 1465003Review.Polish.No abstract available.