Sotgiu G, Piana A F, Migliori G B
Epidemiology and Medical Statistics Unit, Department of Biomedical Sciences, University of Sassari-Research, Medical Education and Professional Development Unit, AOU Sassari, Sassari, Italy.
Int J Tuberc Lung Dis. 2013 Jun;17(6):728-37. doi: 10.5588/ijtld.13.0221.