[1] Alexandria Univ, High Inst Publ Hlth, Family Hlth Dept, Alexandria, Egypt
[2] United Arab Emirates Univ, Inst Publ Hlth, Coll Med & Hlth Sci, Abu Dhabi, U Arab Emirates
[3] Liverpool John Moores Univ, Biostat, Liverpool, England
[4] Princess Nourah Bint Abdulrahman Univ, Coll Nursing, Dept Med Surg Nursing, Riyadh, Saudi Arabia
[5] Utah State Univ, Dept Instruct Technol & Learning Sci, Logan, UT USA
[6] Alexandria Univ, High Inst Publ Hlth, Trop Hlth Dept, Alexandria, Egypt
[7] United Arab Emirates Univ, Inst Publ Hlth, Coll Med & Hlth Sci, POB 15551, Abu Dhabi, U Arab Emirates