[1] Univ Munich, Dept Phys Med & Rehabil, Munich, Germany
[2] Univ Munich, ICF Res Branch, WHO FIC Collaborating Ctr DIMDI, Munich, Germany
[3] WHO, Coordinator Classificat Assessment Surveys & Term, CH-1211 Geneva, Switzerland
[4] Thomas Jefferson Univ, Jefferson Med Coll, Dept Rehabil Med, Philadelphia, PA 19107 USA