[1] Univ Arkansas Med Sci, Dept Pediat, Coll Med, Little Rock, AR 72202 USA
[2] Univ Alabama, Dept Psychol, Tuscaloosa, AL 35487 USA
[3] Arkansas Childrens Hosp, Little Rock, AR 72202 USA
[4] Harding Univ, Dept Psychol, Searcy, AR USA
[5] Univ Virginia, Dept Psychol, Charlottesville, VA 22903 USA
[6] Louisiana State Univ, Dept Psychol, Baton Rouge, LA 70803 USA