The Po River Delta epidemiological study of obstructive lung disease: sampling methods, environmental and population characteristics

Carrozzi L, Giuliano G, Viegi G, Paoletti P, Pede F, Mammini U, Carmignani G, Saracci R, Giuntini C, Lebowitz MD. The Po River Delta epidemiological study of obstructive lung disease: sampling methods, environmental and population characteristics. Eur J Epidemiol. 1990; 6(2): 191-200.