![Dr. Marcel Schaaf](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F09%2FSchaaf.jpg%22%2C%22thumbnail%22%3A%22%2C400%2C%22%7D&hash=0cb0bb9c)
Dr. Marcel Schaaf
Dr. Marcel J.M. Schaaf is Associate Professor at the Institute of Biology Leiden (IBL), at Leiden University. His research focuses on the mechanism of action of glucocorticoids, both natural glucocorticoid hormones such as cortisol which play an important role in our diurnal rhythmicity, and synthetic analogs of this hormone such as dexametahsone and prednisolone which are widely used clinically as anti-inflammatory drugs. In this research, he predominantly uses the zebrafish as a model system and advanced microscopy techniques to study this model.
Other researchers
![Dr. Peter Meerlo](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FPeter-Meerlo.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=ce79b92c)
Peter Meerlo
![Dr. Robbert Havekes](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FRobbert-Havekeskopie.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=f24b10d7)
Robbert Havekes
![Prof. dr. Andries Kalsbeek](/wp-content/themes/yootheme/cache/01/Andries-Kalsbeek-foto-1-scaled-01a82434.jpeg)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FAndries-Kalsbeek-foto-2.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=81bee6e8)
Andries Kalsbeek
![Dr. Joram Mul](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FJoram-Mul-foto-1-scaled.jpeg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=871f780d)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FJoram-Mul-foto-2-scaled.jpeg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=78b3afbe)
Joram Mul
![Prof. dr. Bert van der Horst](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FBert-van-der-Horst-foto-1.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=247bb52d)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FBert-van-der-Horst-foto-2-scaled.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=64106d36)
Bert van der Horst
![Dr. Linda W.M. van Kerkhof](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FLinda-Kerkhof-foto-1-scaled.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=257fe305)
Linda van Kerkhof
![Dr. Suzan Wopereis](/wp-content/themes/yootheme/cache/3b/Suzan-Wopereis-TNO-foto-1-scaled-3bbe04db.jpeg)
![](/wp-content/themes/yootheme/cache/6e/Suzan-Wopereis-TNO-foto-2-scaled-6e3b7858.jpeg)
Suzan Wopereis
![Dr. Joëlle Oosterman](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FJoelle-Oosterman-foto-1kopie-scaled.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=4fe3161d)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FJoelle-Oosterman-foto-2.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=4f148d8f)
Joëlle Oosterman
![Dr. Bert Bredeweg](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FBert-Bredeweg-foto-1-scaled.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=04a2bf8e)
Bert Bredeweg
![Dr. Inês Chaves](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FInes-Chaves-1.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=45614ab8)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FInes-Chaves-2.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=d6453bca)
Inês Chaves
![Dr. Luc Schlangen](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FLuc-Schlangen-1.png%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=e1b151b4)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FLuc-Schlangen-2.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=1f801ffa)
Luc Schlangen
![Dr. Paul P. Geurink](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2Fpaul-geurink-foto-1.png%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=df42a80f)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FDr.-Paul-P.-Geurink.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=6fc74233)
Paul P. Geurink
![Dr. Ir. Kamiel Spoelstra](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FKamiel-Spoelstra-foto1.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=164e704f)
Kamiel Spoelstra
![Prof. dr. Martina G. Vijver](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FMartina-Vijver-foto-1.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=59cbdee0)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FMartina-Vijver-foto-2.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=79a36033)
Martina G. Vijver
![Dr. Hans Slabbekoorn](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FHans-Slabbekoorn-foto1.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=819648ff)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FHans-Slabbekoorn-foto2.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=3c53ed73)
Hans Slabbekoorn
![Dr. Tom de Boer](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FTom-de-Boer-foto1.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=c5a90f59)
![](/wp-content/themes/yootheme/cache/be/Dr.-Tom-de-Boer-2-bed5c5cc.jpeg)
Tom de Boer
![Dr. Emily Strange](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FEmily-Strange-foto1.png%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=a8479389)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FEmily-Strange-foto2-scaled.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=1680232d)
Emily Strange
![Dr. Cieraad](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FEllen-Cieraad-foto1.png%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=34b185ef)
Ellen Cieraad
![Prof. dr. Astrid T. Groot](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FAstrid-Groot-foto1-scaled.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=b3e2f292)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FAstrid-Groot-foto2-scaled.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=36f1e411)
Astrid T. Groot
![Dr. Gerard Oostermeijer](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FGerard-Oostermeijer-foto1.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=35409700)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FGerard-Oostermeijer-foto2.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=525502ef)
Gerard Oostermeijer
![Prof. Dr. Barbara Helm](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FBarbara-Helm-foto2.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=0114aa00)
![](https://bioclockconsortium.org/wp-admin/admin-ajax.php?action=kernel&p=image&src=%7B%22file%22%3A%22wp-content%2Fuploads%2F2021%2F04%2FBarbara-Helm-foto1.jpg%22%2C%22thumbnail%22%3A%22500%2C750%2C%22%7D&hash=4a03365d)
Barbara Helm
![NWO logo](/wp-content/themes/yootheme/cache/b1/NWO-logo-witruimte-b1af8d92.png)
The BioClock Consortium is funded by the NWA-ORC programme of the Dutch Research Council (NWO; project number 1292.19.077).