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1 ﹒ Peters JL，Sutton AJ，Jones DR，et al ﹒ A systematic review of systematic reviews and meta‐analyses of ani mal experi‐ments with guidelines for reporting ﹒ J Environ Sci Health，2006，41.4 ﹒ Perel P，Roberts I，Sena E，et al ﹒ Comparison of treat ment effects ......