RT Journal Article SR Electronic T1 Growth from 3 to 5 Years JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 128 OP 133 DO 10.1136/jech.10.3.128 VO 10 IS 3 A1 John Thomson YR 1956 UL http://jech.bmj.com/content/10/3/128.abstract AB