Published on in Vol 15, No 4 (2013): April
1 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
2 Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
Published on in Vol 15, No 4 (2013): April
1 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
2 Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden