1. Najd Consulting Hospital, PO Box 123251, Riyadh, Kingdom of Saudi Arabia
2. Clinical Pharmacology & DMPK, AstraZeneca R&D Södertälje, SE-151 85 Södertälje, Sweden.
3. Department of Chemistry & Biomedical Sciences, Karlstad University, SE-65188 Karlstad, Sweden
4. Department of Analytical Chemistry, Stockholm University, SE-10691 Stockholm, Sweden