RT Journal Article SR Electronic T1 Thumb-sucking or nail-biting in childhood led to a reduction in atopic sensitisation but not asthma or hay fever JF Archives of disease in childhood - Education & practice edition JO Arch Dis Child Educ Pract Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 167 OP 167 DO 10.1136/archdischild-2016-311819 VO 102 IS 3 YR 2017 UL http://ep.bmj.com/content/102/3/167.abstract AB