TY  - RPRT
TI  - Beware observational studies in neonatal practice.
AU  - Rodney E Willoughby
PY  - 2003
DO  - 10.1001/archpedi.157.9.934-b
UR  - https://pubmed.ncbi.nlm.nih.gov/12963601/
ID  - 12963601
ER  -