1. Department of Internal Medicine and Clinical Biochemistry Laboratory, King Abdulaziz Hospital, National Guard Health Affairs, Al-Ahsa, Saudi Arabia.
2. Department of Medical Biochemistry, Arabian Gulf University College of Medicine and Medical Sciences, Manama, Bahrain.
3. Clinical Biochemistry Laboratory, Salmaniya Medical Complex, Manama, Bahrain.
4. Cell and Developmental Biology, Division of Biosciences, University College London, London, United Kingdom.