Sputum endothelin-1 is increased in cystic fibrosis and chronic obstructive pulmonary disease
GW Chalmers, KJ Macleod, S Sriram, LJ Thomson, C McSharry, BH Stack, NC Thomson
European Respiratory Journal 1999 13: 1288-1292; DOI: 10.1183/09031936.99.13612939