title: The essential role of feasibility studies in supportive care: reply to Sanz Rubiales and del Valle.
authors.affiliation: Department of Palliative Care and Rehabilitation Medicine, M. D. Anderson Cancer Center, Houston, Texas, USA. Electronic address: dhui@mdanderson.org.
authors.forename: David
authors.initials: D
authors.lastname: Hui
authors.affiliation: Department of Palliative Care and Rehabilitation Medicine, M. D. Anderson Cancer Center, Houston, Texas, USA.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Bruera
mesh_terms: D000701:Analgesics, Opioid / Q000008:administration & dosage*; D004417:Dyspnea / Q000188:drug therapy* / Q000209:etiology*; D015444:Exercise; D005283:Fentanyl / Q000008:administration & dosage*; D006801:Humans; D016138:Walking / Q000502:physiology*
chemical_list: D000701:Analgesics, Opioid; D005283:Fentanyl