[1] Ben Gurion Univ Negev, Siaal Res Ctr Family Med & Primary Care, IL-84105 Beer Sheva, Israel
[2] Clalit Hlth Serv, Beer Sheva, Israel
[3] Ben Gurion Univ Negev, Head Pain Relief & Family Med Dept, IL-84105 Beer Sheva, Israel
[4] Ben Gurion Univ Negev, Siaal Family Med & Primary Care Res Ctr, IL-84105 Beer Sheva, Israel