[1] Leiden Univ, Med Ctr, Leiden, Netherlands
[2] Barts Hlth NHS Trust, London, England
[3] Univ Toronto, Toronto, ON, Canada
[4] London Hlth Sci Ctr, London, ON, Canada
[5] Gustave Roussy, Villejuif, France
[6] Univ Groningen, Univ Med Ctr Groningen, Groningen, Netherlands
[7] Erasmus Univ, Med Ctr, Rotterdam, Netherlands