TY - JOUR T1 - How helpful is NHS direct? Postal survey of callers. JO - BMJ UR - http://eprints.whiterose.ac.uk/322/ PY - 2000/04/15 AU - O'Cathain A AU - Munro JF AU - Nicholl JP AU - Knowles E ED - DO - DOI: 10.1136/bmj.320.7241.1035 VL - 320 IS - 7241 SP - 1035 Y2 - 2025/07/19 ER -