Citation

Vreeman RC, Carroll AE. Br. Med. J. BMJ 2008; 337: a2769.

Affiliation

Children's Health Services Research, Indiana University School of Medicine, Indianapolis, IN, USA. rvreeman@iupui.edu

Copyright

(Copyright © 2008, BMJ Publishing Group)

DOI

unavailable

PMID

19091758

Abstract

[Abstract unavailable]

Language: en