RT Journal Article SR Electronic T1 Dr. Kleinberg comments JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 743 OP 743 DO 10.1136/adc.52.9.743 VO 52 IS 9 A1 Frederic Kleinberg YR 1977 UL http://adc.bmj.com/content/52/9/743.1.abstract AB