[1] Univ Complutense, Inst Invest Sanitaria Gregorio Maranon, Madrid 28009, Spain
[2] Fdn Hosp Alcorcon, Madrid, Spain
[3] Hosp Univ la Paz, Madrid, Spain
[4] Hosp Univ 12 Octubre, Madrid, Spain
[5] Hosp Univ Ramon & Cajal, Madrid, Spain
[6] Spanish Breast Canc Res Grp GEICAM Headquarter, Madrid, Spain
[7] Inst Valenciano Oncol, Valencia, Spain
[8] Hosp Clin Univ, Valencia, Spain
[9] Hosp Univ Virgen del Rocio, Seville, Spain
[10] Hosp Valme, Seville, Spain
[11] Univ Autonoma Barcelona, Hosp Santa Creu & St Pau, E-08193 Barcelona, Spain
[12] Hosp Mutua Terrassa, Barcelona, Spain
[13] Hosp Badalona Germans Trias & Pujol, Barcelona, Spain
[14] Corporacion Sanitaria Parc Tauli, Catalonia, Spain
[15] Hosp Clin Barcelona, Barcelona, Spain
[16] Hosp del Mar, Barcelona, Spain
[17] Complejo Hosp Univ A Coruna, La Coruna, Spain
[18] Hosp Univ Miguel Servet, Zaragoza, Spain
[19] Hosp Univ Lozano Blesa, Zaragoza, Spain
[20] Hosp Gen Elche, Alicante, Spain
[21] Inst Catalan Oncol, Girona, Spain
[22] Hosp Univ Marques Valdecilla, Santander, Spain
[23] Hosp Univ Virgen de la Victoria, Malaga, Spain
[24] Hosp Reg Univ Carlos Haya, Malaga, Spain
[25] Hosp Univ Donostia, San Sebastian, Spain
[26] Complejo Hosp Jaen, Jaen, Spain
[27] Hosp Univ Virgen de la Salud, Toledo, OH USA
[28] Hosp Univ Salamanca, Salamanca, Spain
[29] Hosp Univ Burgos, Burgos, Spain