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 close with latest volume, details on Twitter)
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.
Shares of Eli Lilly, Gilead and other healthcare stocks gave the S&P 500 its biggest boost, while the S&P 500 healthcare index gained 0.5 percent and was among the day's best-performing sectors.
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. The stock is up 10.3 percent since Monday's close. Gilead rose 1.2 percent to $119.13. Continuación...