RT Journal Article SR Electronic T1 Drs Davidson and Beasley comment JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 370 OP 370 DO 10.1136/adc.66.3.370-a VO 66 IS 3 YR 1991 UL http://adc.bmj.com/content/66/3/370.2.abstract AB