![International approaches to the prescription of long-term oxygen therapy]()
International approaches to the prescription of long-term oxygen therapyWijkstra, P.J.; Guyatt, G.H.; Ambrosino, N.; Celli, B.R.; Guell, R.; Muir, J.F.; Prefaut, C.; Mendes, E.S.; Ferreira, I.; Austin, P.; Weaver, B.; Goldstein, R.S. · European Respiratory Journal · 2001