%0 Journal Article %A C N Martyn %A D J Barker %A C Osmond %T Selective migration by birthweight. %D 1993 %R 10.1136/jech.47.1.76 %J Journal of Epidemiology and Community Health %P 76 %V 47 %N 1 %U https://jech.bmj.com/content/jech/47/1/76.full.pdf