SudaMediCa, The Sudanese Medical Community

thanks alot for the guidance

. 24 y old man presented with cough and intermittent shortness of breath. he works as spray painter and has no significant prior illness , he doesnot smoke , CXR is normal, spirogram show normal FEV1, FVC, which of the following tests most likely demonestrate a reson for his symptoms a. high resolu...