[1] Univ Geneva, Fac Med, Dept Clin Neurosci, Neurosurg, Rue Gabrielle Perret Gentil 4, CH-1211 Geneva 14, Switzerland
[2] Nippon Med Sch, Dept Neurol Surg, Tokyo, Japan
[3] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA
[4] Mt Sinai Hlth Syst, Dept Neurosurg, New York, NY USA
[5] Jikei Univ, Sch Med, Dept Neurosurg, Minato Ku, Tokyo, Japan
[6] Leiden Univ, Med Ctr, Dept Neurol, Leiden, Netherlands
[7] Mayo Clin, Rochester, MN USA
[8] Johns Hopkins Univ, Sch Med, Baltimore, MD USA
[9] Univ Toronto, Toronto, ON, Canada
[10] Univ Illinois, Chicago, IL USA
[11] Mayo Clin, Rochester, MN USA
[12] Univ Toronto, Toronto, ON, Canada
[13] Univ Iowa, Carver Coll Med, Iowa City, IA USA
[14] Univ Hosp Mannheim, Mannheim, Germany
[15] Univ Zurich, Zurich, Switzerland
[16] Main Line Hlth, Wynnewood, PA USA
[17] Henry Ford Hosp, Detroit, MI 48202 USA
[18] Nippon Med Sch, Tokyo, Japan
[19] Univ Med Ctr, Utrecht, Netherlands
[20] Klin Hirslanden, Zurich, Switzerland
[21] Univ Zurich, Zurich, Switzerland
[22] Univ Iowa, Iowa City, IA USA
[23] Univ Med Ctr, Utrecht, Netherlands
[24] Chinese Univ Hong Kong, Shatin, Hong Kong, Peoples R China
[25] Mayo Clin, Rochester, MN USA
[26] Nippon Med Sch, Tokyo, Japan
[27] Geneva Univ Hosp, Geneva, Switzerland
[28] Henry Ford Hosp, Detroit, MI 48202 USA
[29] Johns Hopkins Univ, Sch Med, Baltimore, MD USA
[30] Baylor Coll Med, Houston, TX 77030 USA
[31] Univ Illinois, Chicago, IL USA
[32] Univ Toronto, Toronto, ON, Canada
[33] Erasmus MC, Rotterdam, Netherlands
[34] Univ Zurich, Zurich, Switzerland
[35] Univ Toronto, Toronto, ON, Canada
[36] Univ Iowa, Carver Coll Med, Iowa City, IA USA
[37] Univ Hosp Mannheim, Mannheim, Germany
[38] Univ Hosp Mannheim, Mannheim, Germany
[39] Univ Iowa, Iowa City, IA USA
[40] Chinese Univ Hong Kong, Shatin, Hong Kong, Peoples R China
[41] Univ Hosp Mannheim, Mannheim, Germany
[42] Univ Med Ctr, Utrecht, Netherlands
[43] Univ Hosp Mannheim, Mannheim, Germany
[44] Univ Zurich, Zurich, Switzerland
[45] Univ Med Ctr, Utrecht, Netherlands
[46] Natl Lib Med, Natl Informat Ctr Hlth Serv Res & Hlth Care Techn, Bethesda, MD USA
[47] Natl Lib Med, Bethesda, MD USA
[48] NINDS, Bldg 36,Rm 4D04, Bethesda, MD 20892 USA
[49] Emmes Corp, Rockville, MD USA