Explanation treatment groupmedicine non-toxic side effect, safe reliable.
说明治疗组药物无毒副作用，安全可靠。
2
One group was given a drug while the other group received a harmless substance instead of medicine without their knowledge.
一组服用药物，而另一组在不知情的情况下服用无害的药物。
3
The plaintiff group, Physicians Committee for Responsible Medicine, tested grilled chicken samples from several chain restaurants, including ones from McDonald’s.