J. H Ryu, I. S Sohn and S. H. Do
BJA: British Journal of Anaesthesia 103 ( 4 ): 490 - 495 , 2009
H. S Na, J. H Lee, J. Y Hwang, J. H Ryu, S. H Han, Y. T Jeon and S. H. Do
BJA: British Journal of Anaesthesia 104 ( 3 ): 344 - 350 , 2010
B. J Krajicek, J. H Ryu, T. E Hartman, V. J Lowe and R. Vassallo
Chest 135 ( 6 ): 1542 - 1549 , 2009