1. Integrated Bioanalysis, Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, South San Francisco, California 94080, United States
2. Clinical Pharmacology and Quantitative Pharmacology, Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, Gaithersburg, Maryland 20878, United States
3. Research and Development Biologics by LC-MS/MS, PPD Laboratories, Richmond, Virginia 23230, United States
4. Faculty of Pharmacy, Zagazig University, Zagazig 2, Zagazig, Egypt