Children who cannot read.

and will be fewer in number than those at present receiving limited-period oxygen. We would take issue with the conclusions of Dr Jones and his colleagues. Current domiciliary oxygen supply is costly, inefficient, and uses outdated equipment. Changes will have to be made, but only on the basis of a clearer knowledge of the type of patient likely to benefit, the duration and quantity of daily therapy required for clinical benefit, and a thorough evaluation of new techniques of delivery, "G" size cylinders, oxygen concentrators, or portable liquid oxygen systems.