TY  - RPRT
TI  - Evaluating maternity services: how representative are data collected using a pregnancy diary?
AU  - Nottingham Pregnancy Diary Research Group
PY  - 2001
DO  - 10.1038/sj.ph.1900727
UR  - https://pubmed.ncbi.nlm.nih.gov/11406775/
ID  - 11406775
ER  -