The use of carboxymethylcellulose gel to increase non-viral gene transfer in mouse airways. by Griesenbach, U, Meng, C, Farley, R, Wasowicz, M, Munkonge, F, Chan, M, Stoneham, C, Sumner-Jones, S, Pringle, I, Gill, DR, Hyde, S, Stevenson, B, Holder, E, Ban, H, Hasegawa, M, Cheng, S, Scheule, R, Sinn, P, McCray, P, Alton, E