TY - JOUR T1 - Per cent of predicted as the limit of normal in pulmonary function testing: a statistically valid approach. JF - Thorax JO - Thorax SP - 1 LP - 3 DO - 10.1136/thx.34.1.1 VL - 34 IS - 1 AU - B J Sobol AU - P G Sobol Y1 - 1979/02/01 UR - http://thorax.bmj.com/content/34/1/1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -