Date	Event	Description
2 April 2007	New search has been performed	We updated the search of the Cochrane Neuromuscular Disease Trials Register in April 2007, MEDLINE (January 1966 to February 2007) and EMBASE (January 1980 to February 2007). Two new trials were identified which are currently only available in abstract form and the data are not available for inclusion.
6 January 2005	New citation required and conclusions have changed	Substantive amendment