[word=by | lemma=guide] [lemma=rigorous] □
[word=by | lemma=guide] [lemma=rigorous] [□]
[word=by | lemma=guide] [lemma=rigorous] □ □
We want the implementation of genetic engineering to be guided by rigorous scientific safety standards . Before allowing drugs for food-producing animals to be marketed , FDA requires that these drugs be shown to be safe by rigorous scientific studies . Both poets were one in their conviction that a spiritual reality lay behind the world of everyday : the only difference between them lay in their varying readiness to be influenced by rigorous scientific analysis . There have been some promising results with studies of biofeedback , sometimes called neurofeedback ; however , those studies have used very small samples , so that treatment also has not been proved by rigorous scientific standards .