JORDANOGLOU, J HADJISTAVROU, C TATSIS, G ANEVLAVIS, E and MELISSINOS, C, TOTAL EFFECTIVE TIME OF THE FORCED EXPIROGRAM IN DISEASE - SOURCES OF ERROR AND A CORRECTION FACTOR, Thorax, (37), 304-308, 1982, BRITISH MED JOURNAL PUBL GROUP, 0040-6376, 1468-3296