1Laghi F, Tobin MJ. Disorders of the respiratory muscles[ J]. Am J Respir Crit Care Med, 2003, 168:10-48.
2Tobin MJ, Laghi F, Jubran A. Narrative review: ventilator- inducedrespiratory muscleweakness [ J]. Ann Intern Med, 2010, 153 : 240-245.
3Lennon EA, Simon G. The height of the diaphragm in the chest radiograph of normal adults[ J]. Br J Radiol, 1965,38:937-943.
4Suwatanapongched T, Gierada DS, Slone RM, et al. Variation in diaphragmposition and shape in adults with normalpulmonary function[ J]. Chest ,2003,123:20 i9-2027.
5Verhey PT, Gosselin MV, Primack ST, et al. Differentiating diaphragmatic paralysis and eventration[ J]. Acad Radiol, 2007, 14:420-425.
