there is little information on the efficacy of this treatment
It has proved efficacy in the treatment of depression and has been shown to be cost effective.
Concerns about the safety and efficacy of human cloning, then, do not warrant a ban in law.
The sooner the morning after pill is taken after sex the greater its efficacy .
Well, I don't have a huge list of examples but I've seen enough to convince me of it's efficacy .
Blood tests may be needed periodically to monitor the treatment and its efficacy .
Clinical trials are in progress to assess its efficacy in severe asthma.
In order to have any efficacy whatever, a world organization must be able to override big states as well as small ones.
Drugs with comparable efficacy but better safety profiles later appeared on the market.
However, there is very little evidence on the comparative efficacy of classes of drugs.