1 Princess Margaret Cancer Centre, University Health Network and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada. Electronic address: ming.tsao@uhn.ca.
2 Royal Brompton and Harefield NHS Foundation Trust, London, United Kingdom; National Heart and Lung Institute, Imperial College, London, United Kingdom.
3 Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota.
4 Institute of Pathology, University Medical Centre Mannheim and Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
5 Memorial Sloan Kettering Cancer Center, New York, New York.