In a meeting <a href=" http://www.alianzared.com/acyclovir-prophylaxis-dose-cold-sores.pdf ">acyclovir 800 mg dosis</a> WASHINGTON, Sept 18 (Reuters) - The U.S. Federal Reservedefied investor expectations on Wednesday by postponing thestart of the wind down of its massive monetary stimulus, sayingit wanted to wait for more evidence of solid economic growth.