[1] Bispebjerg & Frederiksberg Univ Hosp, Sect Sports Traumatol M51, Copenhagen, Denmark
[2] Novo Nordisk AS, Soborg, Denmark
[3] Univ Copenhagen, Dept Publ Hlth, Res Unit Gen Practice, Copenhagen, Denmark
[4] Univ Copenhagen, Dept Publ Hlth, Sect Gen Practice, Copenhagen, Denmark
[5] Reg Zealand, Primary Hlth Care Res Unit, Soro, Denmark
[6] Univ Copenhagen, Dept Publ Hlth, Sect Biostat, Copenhagen, Denmark