J. W. Koper

Working Memory Performance Is Associated with Common Glucocorticoid Receptor Gene Polymorphisms

D. Hellhammer, S. Entringer, S. Wüst, 2009, Neuropsychobiology.

A novel tool in the diagnosis and follow-up of (cyclic) Cushing's syndrome: measurement of long-term cortisol in scalp hair.

F. de Jong, E. V. van Rossum, J. Koper, 2012, The Journal of clinical endocrinology and metabolism.