TY - JOUR AU - MartinĂ³n Torres, Federico PY - 2015 SN - 2213-2600 UR - http://hdl.handle.net/20.500.11940/8287 LA - eng TI - What's weighing down heliox? DO - 10.1016/S2213-2600(14)70314-5 T2 - The Lancet. Respiratory medicine. M2 - 14 VL - 3 ER -