Morice, Alyn, Smith, Jaclyn A., McGarvey, Lorcan, Birring, Surinder S., Parker, Sean M., Turner, Alice, Hummel, Thomas, Gashaw, Isabella, Fels, Lueder, Klein, Stefan, Francke, Klaus, Friedrich, Christian, "Eliapixant (BAY 1817080), a P2X3 receptor antagonist, in refractory chronic cough: A randomised, placebo-controlled, crossover phase 2a study", European Respiratory Journal, 2021