David Field, Elizabeth S Draper, Melanie J Gompels, Colin Green, Ann Johnson, David Shortland et al
Field D, Draper E S, Gompels M J, Green C, Johnson A, Shortland D et al.
Measuring later health status of high risk infants: randomised comparison of two simple methods of data collection
BMJ 2001; 323 :1276
doi:10.1136/bmj.323.7324.1276