Author information:
(1)HM Sanchinarro University Hospital-CIBERONC, Madrid, Spain.
(2)HM Sanchinarro University Hospital, Madrid, Spain.
(3)La Paz University Hospital, Madrid, Spain.
(4)Ramon y Cajal University Hospital, IRYCIS and CIBERESP, Madrid, Spain.
(5)Germans Trias i Pujol University Hospital, Badalona, Spain.
(6)Catalan Institute of Oncology-Germans Trias i Pujol University Hospital, 
Universitat Autònoma Barcelona (UAB), Badalona-Applied Research Group of 
Oncology (B-ARGO), Badalona, Spain.
(7)General University Hospital-ISABIAL, Alicante, Spain.
(8)Institute of Health Research-Jimenez Diaz Foundation-CIBERONC, Madrid, Spain.
(9)Institute of Health Research-Jimenez Diaz Foundation, Madrid, Spain.
(10)Vall d'Hebron University Hospital, Barcelona, Spain.
(11)Quironsalud Hospital, Barcelona, Spain.
(12)La Fe University Hospital, Valencia, Spain.
(13)Clinico San Carlos University Hospital, Madrid, Spain.
(14)Puerta del Mar University Hospital, Cadiz, Spain.
(15)Clinico de Santiago University Hospital, Santiago De Compostela, Spain.
(16)Insular Materno-Infantil University Hospital Complex, Las Palmas de Gran 
Canaria, Spain.
(17)Clinic Hospital, Barcelona, Spain.
(18)Alvaro Cunqueiro Hospital, Vigo, Spain.
(19)University of Navarra Clinic, Pamplona, Spain.
(20)Marques de Valdecilla University Hospital, Santander, Spain.
(21)Hospital del Mar, Barcelona, Spain.
(22)Clinico University Hospital, Valencia, Spain.
(23)Cruces University Hospital, Baracaldo, Spain.
(24)Miguel Servet University Hospital, Zaragoza, Spain.
(25)University Hospital of Gran Canaria Doctor Negrin, Las Palmas de Gran 
Canaria, Spain.
(26)12 de Octubre University Hospital, Madrid, Spain.
(27)Ramon y Cajal University Hospital, Madrid, Spain.
(28)12 de Octubre University Hospital-CIBERONC, Madrid, Spain.
(29)Ramon y Cajal University Hospital-CIBERONC, Madrid, Spain.
(30)HM Sanchinarro University Hospital-CIBERONC, Madrid, Spain. Electronic 
address: flopezrios@hmhospitales.com.