This is a randomised controlled trial of the effect of carbocisteine on acute exacerbation of chronic obstructive pulmonary disease, although I can't immediately see why it is called PEACE. However, that aside, it is in the Lancet, doi: 10.1016/S0140-6736(08)60869-7. Access should be possible for University of Leicester members, who are welcome to contact me if they have problems.
Jin-Ping Zheng, Jian Kang, Shao-Guang Huang, Ping Chen, Wan-Zen Yao, Lan Yang, Chun-Xue Bai, Chang-Zheng Wang, Chen Wang, Bao-Yuan Chen, Yi Shi, Chun-Tao Liu, Ping Chen, Qiang Li, Zhen-Shan Wang, Yi-Jiang Huang, Zhi-Yang Luo, Fei-Peng Chen, Jian-Zhang Yuan, Ben-Tong Yuan, Hui-Ping Qian, Rong-Chang Zhi, Nan-Shan Zhong, Effect of carbocisteine on acute exacerbation of chronic obstructive pulmonary disease (PEACE Study): a randomised placebo-controlled study, The Lancet, Volume 371, Issue 9629, , 14 June 2008-20 June 2008, Pages 2013-2018.(http://www.sciencedirect.com/science/article/B6T1B-4SRFCCJ-11/1/5bd9c035756f67be393458fb2f7a4a2a)