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목록placebo (1)
rand(life)
수업자료공유7 - 이중맹검법(double blind test)
Unfortunately, over-the-counter cough and cold medicines are not the answer. Because young children average ten to twelve colds a year, it seems like they are sick all the time. ( ① ) As pediatricians, we really wish that we could recommend something to help children feel better. ( ② ) First of all, they don't work. ( ③ ) All six randomized, placebo-controlled studies of the use of cough and col..
영어관련
2010. 11. 12. 08:30