Centre for Human Drug Research We are a full service contract research organisation (CRO) located in Leiden, The Netherlands. We provide a full spectrum of high quality clinical pharmacology services to the (bio-) pharmaceutical industry.  We are collaborative partners, offering sophisticated advice to our clients on all aspects of the process of drug development. We have long-standing relationships with many of our clients, enabling us to anticipate their service needs. Thus, we speed up the process and make it more efficient. We also offer added value because of our own research programs; we develop new biomarkers, optimise our clinical research methods and add new knowledge and expertise to our consultancy. This synergy of services results in a unique CRO that operates on a high scientific level but remains focused on our clients’ objectives