[R] Quantile Regressions/Multi-stage complex survey design

[Neil KM]

Hello,
I am utilizing linear quantile regression models to analyze health survey 
data. The survey (NHANES) is a multi-stage complex survey and I want to 
incorporate survey sampling weights in generating my quantile estimates. To 
my knowledge, this is currently not possible in SAS or STATA. Is there any 
way to do this in R? If so, how?
Thanks!
-Kish