Reference : Ann R Coll Surg Engl.~Ingenta plc~http://openurl.ingenta.com/content/nlm?genre=article&issn=003
more
Reference : Ann R Coll Surg Engl.~Ingenta plc~http://openurl.ingenta.com/content/nlm?genre=article&issn=0035-8843&volume=92&issue=4&spage=W7&aulast=Virich
less