Lavaur, J
Lemaire, M
Pype, J
Nogue, D Le
Hirsch, E C
Michel, P P
Article History
Received: 14 January 2016
Revised: 20 January 2016
Accepted: 3 February 2016
First Online: 16 May 2016
Competing interests
: ML and JP are Air Liquide employees. DLN is recipient of a CIFRE fellowship (2014/0589) co-funded by Association Nationale de la Recherche et de la Technologie (ANRT) and Air Liquide Santé International.