RT Journal Article SR Electronic T1 The role of negative pressure ventilation JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 94 OP 94 DO 10.1136/adc.79.1.94b VO 79 IS 1 A1 SAMUELS, MARTIN A1 SOUTHALL, DAVID YR 1998 UL http://adc.bmj.com/content/79/1/94.3.abstract AB