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From the Centers for Disease Control and Prevention (CDC) (I.K.O., S.M.T., S.I.G.,
D.L.S., J.T.W.) and the Epidemic Intelligence Service, CDC (I.K.O., S.M.T.), Atlanta;
and the Ministry of Health (A.M.A.-A., A.A.B., K.Z.A., E.L.A., B.M.A., T.A.M.), the
Community and Preventive Medicine Center, National Guard Health Affairs, Western Region,
Ministry of National Guard (H.A.-M.), King Faisal Specialist Hospital and Research
Center (B.M.A.), and the Department of Medicine, Faculty of Medicine, King Abdulaziz
University (T.A.M.), Jeddah, and the Department of Family and Community Medicine,
Faculty of Medicine, Al-Qassim University, Al-Qassim (M.S.A.) - all in Saudi Arabia.