ABC of oxygen: diving and oxygen

An editorial error occurred in this article by Peter Wilmshurst(10 October, p 996-9). The table on decompression illness (p 997) was incorrectly interpreted. It should have appeared as below. In addition, on p 998 the legend to the diagram of the oxygen rebreather should state that nitrogen accumulation [not carbon dioxide] is a problem. The picture at the bottom of the page is of a professional surface supplied diver.