Prognostic factors in ALS: A critical review
Chio, et alia (Torino-Italy, Harvard, Dublin-Ireland, Dundee-Scotland, Preston-UK, Milano-Italy, NIH-USA)
Published 2009, "Amyotrophic Lateral Sclerosis"
http://www.tandfonline.com/doi/abs/1...82960802566824

Respiratory effects of amyotrophic lateral sclerosis: problems and solutions.
Lechtzin, Noah (Johns Hopkins)
Published August 2006, "Respiratory Care" Vol 51 No 8
http://www.ncbi.nlm.nih.gov/pubmed/16867198