Forsch Komplementarmed Klass Naturheilkd. 2002 Dec; 9(6): 359-60; author reply 360.

[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.