[1] Minist Social Affairs, Div Mental Retardat, Off Med Director, NICHHD, IL-91012 Jerusalem, Israel
[2] Ariel Univ, Ctr Samaria, Fac Social Sci, Dept Behav Sci, Ariel, Israel
[3] Univ Kentucky, Kentucky Childrens Hosp, Lexington, KY USA
[4] Ben Gurion Univ Negev, Fac Hlth Sci, Dept Family Med, Beer Sheva, Israel