US STOCKS-Wall St climbs after retail sales data; healthcare up
* IMF says major differences remain with Greece
* May retail sales rise 1.2 pct vs est 1.1 pct
* Citrix jumps after investor sends letter to board
* Twitter rallies after hours; CEO to step down
* Indexes up: Dow 0.2 pct, S&P 0.2 pct, Nasdaq 0.1 pct (Updates to close)
By Caroline Valetkevitch
June 11 (Reuters) - U.S. stocks climbed on Thursday as retail sales data lifted the outlook for consumer spending and as healthcare shares gained.
The S&P 500 health care index gained 0.5 percent and was among the day's best-performing sectors, led by shares of Eli Lilly.
Eli Lilly hit a 14-year high, closing up 4.1 percent at $86.59, with investors anticipating data from an extended trial of an experimental Alzheimer's drug that could become available to doctors in the coming weeks. Continuación...