[1] Univ Groningen Hosp, Dept Internal Med, NL-9700 RB Groningen, Netherlands
[2] Univ Groningen Hosp, Dept Cardiol, NL-9700 RB Groningen, Netherlands
[3] Univ Groningen Hosp, Dept Endocrinol, NL-9700 RB Groningen, Netherlands
[4] Univ Groningen Hosp, Dept Surg Oncol, NL-9700 RB Groningen, Netherlands
[5] Univ Groningen Hosp, Div Med Oncol, NL-9700 RB Groningen, Netherlands