DUBAI (Reuters) - Troubled hospital operator NMC Health said on Monday it requested its shares be delisted from the London Stock Exchange after they were suspended two months ago.Shares in the UAE-based company were suspended two months ago and it was placed into administration this month following an application form one of the company's biggest lenders, Abu Dhabi Commercial Bank .That move followed NMC revising its debt position to $6.6 billion, well above earlier estimates."We are working at..