[Re: Lüdtke R, et al.: An example on the value of non-randomisation in clinical trials in complementary medicine. Forsch Komplementärmed Klass Naturheilkd 2002;9:105-109].
Schneider
B
B
D000529:Complementary Therapies; D006801:Humans; D012852:Sinusitis / Q000188:drug therapy / Q000628:therapy*; D013223:Statistics as Topic; D016896:Treatment Outcome