In HIV negative patients given MM compared to placebo , mean villous height was @ % greater ( @ v. @ m ; @ % CI of difference @-@ @ m ; P = @ ) , mean villous area was @ % greater ( @ v. @ m@/@ m ; @ % CI of difference @-@ m@/@ m ; P = @ ) , and median villous perimeter was @ % greater ( @ v. @ m/@ m ; @ % CI of difference @-@ @ m/@ m ; P = @ ) .