1. Clinical Epidemiology/Clinical Pharmacology, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital Solna, SE-171 76 Stockholm, Sweden
2. Department of Healthcare Development, Stockholm County Council, Public Healthcare Services Committee, Karolinska University Hospital Solna, Stockholm, Sweden
3. Department of Medicine Solna, Centre for Pharmacoepidemiology, Karolinska Institutet, Karolinska University Hospital Solna, Stockholm, Sweden