[1] Gelre Hosp, Dept Surg, Apeldoorn, Netherlands
[2] Acad Med Ctr, Dept Surg, POB 22660, NL-1100 DD Amsterdam, Netherlands
[3] Maxima Med Ctr, Dept Surg, Eindhoven, Netherlands
[4] Univ Med Ctr, Dept Surg, Utrecht, Netherlands
[5] Gelre Hosp, Dept Geriatr, Apeldoorn, Netherlands
[6] Univ Med Ctr Groningen, Dept Internal Geriatr Med, Groningen, Netherlands
[7] Radboud Univ Nijmegen, Med Ctr, Dept Surg, Nijmegen, Netherlands