Untargeted molecular analysis of exhaled breath as a diagnostic test for ventilator-associated lower respiratory tract infections (BreathDx) by van Oort, PM, Nijsen, TM, White, IR, Knobel, HH, Felton, T, Rattray, N, Lawal, O, Bulut, M, Ahmed, W, Artigas, A, Povoa, PR, Martin-Loeches, I, Weda, H, Goodacre, R, Schultz, MJ, Dark, PM, Fowler, SJ, Bos, LD