1. Department of Pediatrics, District of Columbia General Hospital, Georgetown University Hospital, Washington, D. C. 20003
2. Chief Medical Officer, Department of Pediatrics, District of Columbia General Hospital; Associate Clinical Professor, Georgetown, George Washington and Howard Universities, Washington, D. C.
3. Department of Pediatrics, Howard University, Washington, D. C.
4. Department of Pediatrics, District of Columbia, General Hospital, Washington, D.C.