- Publication venue
- Publication date
- 15/02/1991
- Field of study
- Publication venue
- Publication date
- 17/07/1995
- Field of study
- Publication venue
- Publication date
- 17/07/1995
- Field of study
- Publication venue
- Publication date
- 17/07/1995
- Field of study
- Publication venue
- BMJ Publishing Group
- Publication date
- Field of study
- Publication venue
- Publication date
- 01/02/1997
- Field of study
- Publication venue
- Publication date
- 01/02/1997
- Field of study