[1] Uppsala Univ, Dept Surg Sci, Uppsala, Sweden
[2] Gothenburg Univ, Sahlgrenska Univ Hosp, Inst Clin Sci, Dept Surg,Sahlgrenska Acad, Gothenburg, Sweden
[3] Capio St Gorans Hosp, Dept Surg, Stockholm, Sweden
[4] Karolinska Intitutet, Dept Med & Surg, Stockholm, Sweden
[5] Umea Univ, Dept Surg & Perioperat Sci, Umea, Sweden
[6] Univ Helsinki, Dept Surg, Helsinki, Finland
[7] Helsinki Univ Hosp, Helsinki, Finland
[8] Halland Hosp, Dept Surg, Halmstad, Sweden
[9] Lund Univ, Dept Clin Sci, Lund, Sweden
[10] Univ Gothenburg, Inst Clin Sci, Sahlgrenska Acad, Dept Plast Surg, Gothenburg, Sweden
[11] Sahlgrens Univ Hosp, Dept Plast & Reconstruct Surg, Reg Vastra Gotaland, Gothenburg, Sweden
[12] Sveastat AB, Kungsbacka, Sweden
[13] Karolinska Univ Hosp, Dept Plast & Craniofacial Surg, Stockholm, Sweden
[14] Uppsala Univ Hosp, Dept Plast & Reconstruct Surg, Uppsala, Sweden