1. Beatson Oncology Centre; Gartnavel General Hospital Glasgow UK G12 0YN
2. Hospital de la Santa Creu i Sant Pau; Iberoamerican Cochrane Centre. CIBER Epidemiología y Salud Pública (CIBERESP) Spain; Casa de Convalescència c/ Sant Antoni M. Claret 171, 4ª planta Barcelona Catalunya Spain 08041
3. Hospital de la Santa Creu i Sant Pau; Radiation Oncology; Sant Antoni Mª Claret, 167 Barcelona Spain 08025
4. National Institute for Health and Clinical Excellence; Centre for Clinical Practice; MidCity Place 71 High Holborn London UK WC1V 6NA