Mortality differences between self-employed and paid employees: a 5-year follow-up study of the working population in Sweden
Susanna Toivanen, Rosane Härter Griep, Christin Mellner, Stig Vinberg, Sandra Eloranta
Occupational and Environmental Medicine Sep 2016, 73 (9) 627-636; DOI: 10.1136/oemed-2015-103472