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Ptak-Belowska A, Brzozowski T, Pajdo R, Pawlik M, Kwiecień S, Drozdowicz D, Pawlik WW.Ptak-Belowska A, et al. Among authors: pawlik m, pawlik ww.Folia Med Cracov. 2008;49(3-4):23-35.Folia Med Cracov. 2008.PMID: 20050576Polish.