Proactive and systematic multidimensional needs assessment in patients with advanced cancer approaching palliative care: a study protocol oleh Albert Balaguer, Carlos Centeno, Maria Arantzamendi, Denise Pergolizzi, Iris Crespo, Cristina Monforte-Royo, Alberto Alonso-Babarro, Alazne Belar, Blanca Goni-Fuste, Joaquim Julià-Torras, Marina Martinez, Dolors Mateo-Ortega, Luis May, Deborah Moreno-Alonso, Maria Nabal Vicuña, Antonio Noguera, Antonio Pascual, Encarnacion Perez-Bret, Javier Rocafort, Andrea Rodríguez-Prat, Dulce Rodriguez, Carme Sala, Judith Serna