23:1623:16, 28 January 2016diffhist+2
m
ALS
corrected typo "cause is often known in 90% to 95% of cases" to "cause is often unknown;" now internally consistent with statement lower down
23:1623:16, 28 January 2016diffhist+2
m
ALS
corrected typo "cause is often known in 90% to 95% of cases" to "cause is often unknown;" now internally consistent with statement lower down