article 2013 Effect of a therapeutic dose of pseudoephedrine on swimmers’ performance P J-L Gradidge, D Constantinou, S-M Heard, C King, H Morris-Eyton JournalSouth African Journal of Sports MedicineDOI10.7196/SAJSM.378Study typedouble-blinded cross-over studyPopulationmasters swimmers View on DOI ↗