(Reuters) - Private healthcare provider NMC Health , hurt by short-selling by Muddy Waters, said on Friday an independent review committee looking into the matter had hired FBI ex-boss Louis Freeh.NMC, the United Arab Emirates' largest private healthcare provider, launched an independent review of its finances last month after short-seller Muddy Waters questioned the value of its assets and cash balance while announcing a short position.Since Muddy Waters' claims were launched on Dec. 17, NMC..