[1] UNIV GOTEBORG, DEPT PRIMARY HLTH CARE, REDBERGSVAGEN 6, S-41665 GOTHENBURG, SWEDEN
[2] UNIV UPPSALA, DEPT PRIMARY HLTH CARE, S-75105 UPPSALA, SWEDEN
[3] UNIV LUND, DEPT PRIMARY HLTH CARE, S-22101 LUND, SWEDEN
[4] PRIMARY HLTH CARE CTR, HUDIKSVALL, SWEDEN
[5] PRIMARY HLTH CARE CTR, HOGANAS, SWEDEN
[6] PRIMARY HLTH CARE CTR, SODERHAMN, SWEDEN
[7] PRIMARY HLTH CARE CTR, KRISTINEHAMN, SWEDEN
[8] PRIMARY HLTH CARE CTR, BOLLNAS, SWEDEN
[9] PRIMARY HLTH CARE CTR, LJUNGBY, SWEDEN