Thiadens, H. A., de Bock, G. H., Dekker, F. W., Huysman, J. A. N., van Houwelingen, J. C., Springer, M. P., & Postma, D. S. (1998). Identifying asthma and chronic obstructive pulmonary disease in patients with persistent cough presenting to general practitioners: Descriptive study. British Medical Journal.

Thiadens, H A., G H. de Bock, F W. Dekker, J A N. Huysman, J C. van Houwelingen, M P. Springer, i D S. Postma. Identifying Asthma and Chronic Obstructive Pulmonary Disease in Patients With Persistent Cough Presenting to General Practitioners: Descriptive Study. British Medical Journal, 1998.

Thiadens, H A., et al. Identifying Asthma and Chronic Obstructive Pulmonary Disease in Patients With Persistent Cough Presenting to General Practitioners: Descriptive Study. British Medical Journal, 1998.