[1] Hosp Santa Creu & Sant Pau, Iberoamer Cochrane Ctr, C St Antoni Maria Claret 167,Pavello 18,Planta 0, Barcelona 08025, Spain
[2] Basque Govt, Basque Off Hlth Technol Assessment Osteba, Dept Hlth & Consumer Affairs, Calle Donostia 1, ES-01010 Vitoria, Spain
[3] Natl Inst Hlth & Care Excellence, Level 1A City Tower,Piccadilly Plaza, Manchester M1 4BT, Lancs, England
[4] Hosp Santa Creu & Sant Pau, Serv Clin Epidemiol & Publ Hlth, C Sant Antoni Maria Claret 167,Pavello 18, Barcelona 08025, Spain
[5] Osakidetza Basque Hlth Serv, Alza Hlth Ctr, Avda Larratxo S-N, Donostia San Sebastian 20013, Spain
[6] Corp Sanitaria Parc Tauli Sabadell, Clin Epidemiol & Canc Screening, Parc Tauli S-N, Sabadell 08208, Spain
[7] CIBER Epidemiol & Salud Publ CIBERESP, Barcelona, Spain