Complex sentence: Results of clinical trials of both acupuncture and Chinese herbs are numerous and suggest a potential remedy for acute urticaria but these are far from conclusive and possibly a result of the placebo effect, as they did not provide a control group.
Split into simpler sentences: Results of clinical trials of both acupuncture and Chinese herbs are numerous and suggest a potential remedy for acute urticaria. But the results are far from conclusive and are possibly a result of the placebo effect, as the trials did not involve a control group.