[1] St Elizabeth Hosp, Dept Internal Med, Breedestr 193, Willemstad, Curacao, Netherlands
[2] Leiden Univ, Med Ctr, Dept Med, Div Nephrol, Leiden, Netherlands
[3] Leiden Univ, Leiden, Netherlands
[4] Univ Groningen, Univ Med Ctr Groningen, Dept Internal Med, Groningen, Netherlands