[1] Johns Hopkins Univ, Sch Med, Dept Gynecol & Obstet, Baltimore, MD 21231 USA
[2] Johns Hopkins Univ, Sch Med, Dept Oncol, Baltimore, MD 21231 USA
[3] Rikshosp Univ Hosp, Norwegian Radium Hosp, Dept Pathol, N-0310 Oslo, Norway
[4] Univ South Carolina, Sch Med, Dept Pathol & Microbiol, Columbia, SC 29203 USA
[5] Univ South Carolina, Sch Med, Dept Immunol, Columbia, SC 29203 USA
[6] Natl Taiwan Univ, Dept Med, Taipei 10617, Taiwan
[7] Wilhelminenspital Stadt Wien, Ctr Hematol & Oncol, Dept Internal Med 1, A-1160 Vienna, Austria