机构:
Univ Sheffield, Med Care Res Unit, Sheffield S10 2TN, S Yorkshire, EnglandUniv Sheffield, Med Care Res Unit, Sheffield S10 2TN, S Yorkshire, England
Nicholl, J
BRITISH MEDICAL JOURNAL,
2000,
320
(7243):
: 1217
-
1217
机构:
Univ Otago, Dunedin Sch Med, Dept Gen Practice, RNZCGP Res Unit, Dunedin, New ZealandUniv Otago, Dunedin Sch Med, Dept Gen Practice, RNZCGP Res Unit, Dunedin, New Zealand