Vocal cord disorder symptom as a part of differential diagnosis of occupational asthma. A case report - Krakowiak, Anna; Pałczyński, Cezary; Dudek, Wojciech; Wittczak, Tomasz; Walusiak, Jolanta; Gruchała, Jacek; Kotyło, Piotr; Śliwińska-Kowalska, Mariola (Nofer Institute of Occupational Medicine)