1 MD Anderson Cancer Center, Department of Pathology, Houston, TX 77030. Electronic address: anaggar@mdanderson.org.
2 Department of Pathology, Queen Elizabeth Hospital, Kowloon, Hong Kong.
3 Department of Oral and Maxillofacial Pathobiology, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima City, Japan 734-8553.
4 University of California, San Francisco, CA 94158, United States.
5 Department of Pathology HP437, Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands.