RT Journal Article SR Electronic T1 Carrying frozen specimens by air. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 523 OP 523 DO 10.1136/adc.53.6.523 VO 53 IS 6 A1 E M Bryan YR 1978 UL http://adc.bmj.com/content/53/6/523.abstract AB