[1
]
Department of Endocrinology (AA31), University of Groningen, University Medical Center
Groningen, PO-box 30.001, 9700 RB Groningen, The Netherlands. Electronic address:
t.osinga@umcg.nl.
[2
]
Department of Laboratory Medicine (EA61), University of Groningen, University Medical
Center Groningen, PO-box 30.001, 9700 RB Groningen, The Netherlands. Electronic address:
i.p.kema@umcg.nl.
[3
]
Department of Endocrinology (AA31), University of Groningen, University Medical Center
Groningen, PO-box 30.001, 9700 RB Groningen, The Netherlands. Electronic address:
m.n.kerstens@umcg.nl.
[4
]
Department of Laboratory Medicine (EA61), University of Groningen, University Medical
Center Groningen, PO-box 30.001, 9700 RB Groningen, The Netherlands. Electronic address:
w.h.a.de.jong@umcg.nl.
[5
]
Department of Laboratory Medicine (EA61), University of Groningen, University Medical
Center Groningen, PO-box 30.001, 9700 RB Groningen, The Netherlands. Electronic address:
h.j.r.van.faassen@umcg.nl.
[6
]
Department of Endocrinology (AA31), University of Groningen, University Medical Center
Groningen, PO-box 30.001, 9700 RB Groningen, The Netherlands. Electronic address:
r.p.f.dullaart@umcg.nl.
[7
]
Department of Endocrinology (AA31), University of Groningen, University Medical Center
Groningen, PO-box 30.001, 9700 RB Groningen, The Netherlands. Electronic address:
t.p.links@umcg.nl.
[8
]
Department of Endocrinology (AA31), University of Groningen, University Medical Center
Groningen, PO-box 30.001, 9700 RB Groningen, The Netherlands. Electronic address:
a.n.a.van.der.horst@umcg.nl.