RT Journal Article SR Electronic T1 Ethical issues: invasive ventilation in amyotrophic lateral sclerosis JF BMJ Supportive & Palliative Care JO BMJ Support Palliat Care FD British Medical Journal Publishing Group SP 85 OP 86 DO 10.1136/bmjspcare-2012-000195 VO 2 IS 2 A1 Rossella Spataro A1 Vincenzo La Bella YR 2012 UL http://spcare.bmj.com/content/2/2/85.2.abstract AB