[1] Harlem Hosp Med Ctr, Dept Pediat, New York, NY 10037 USA
[2] Med & Hlth Res Assoc Inc, New York, NY USA
[3] Bronx Lebanon Hosp, New York, NY USA
[4] Metropolitan Hosp, New York, NY USA
[5] Albert Einstein Coll Med, New York, NY USA
[6] New York City Dept Hlth, New York, NY 10013 USA
[7] Ctr Dis Control & Prevent, Atlanta, GA USA