Clinical Pharmacology, Biogen, Cambridge, Massachusetts, USA. Receptos, a wholly owned subsidiary of Celgene Corporation, San Diego, California, USA. Clinical Pharmacology and Pharmacometrics, AbbVie, North Chicago, Illinois, USA. Faculty of Pharmacy, Cairo University, Cairo, Egypt. Global Clinical Operations, Biogen, Maidenhead, Berkshire, UK. Global Clinical Development, Biogen, Cambridge, Massachusetts, USA.