Fourth International Workshop on Intelligent Informatics in Biology and Medicine (IIBM 2011) Organizing Committee Workshop Co-Chairs Hao-Teng Chang, China Medical University, Taiwan Hau San Wong, City University of Hong Kong, China Oliver Ray, University of Bristol, UK Program Committee Tatsuya Akutsu, Kyoto University, Japan Raffaele A. Calogero, Torino University, Italy Keith C.C. Chan, The Hong Kong Polytechnic Univ., China Luonan Chen, Chinese Academy of Science, China Zhi-Zhong Chen, Tokyo Denki University, Japan Hsueh-Ting Chu, Asia University, Taiwan Hon Nian Chua, A*STAR, Singapore Ping-Tsai Chung, Long Island University, USA Katsuhisa Horimoto, AIST, Japan Chien-Yeh Hsu, Taipei Medical University, Taiwan Hui-Huang Hsu, Tamkang University, Taiwan Jun Huan, University of Kansas, USA Jari Hyttinen, Tampere University of Technology, Finland Hyunsoo Kim, The Wistar Institute, USA Sun Kim, Indiana University, USA David P. Kreil, Boku University Vienna, Austria Hiroyuki Kurata, Kyushu Institute of Technology, Japan Maria Liakata, University of Aberystwyth, UK Gouhui Lin, University of Alberta, Canada Shing-Hwa Lu, Taipei City Hospital, Taiwan Man-Wai Mak, The Hong Kong Polytechnic Univ., China Hiroshi Matsuno, Yamaguchi University, Japan Martin Middendorf, University of Leipzig, Germany Tun-Wen Pai, National Taiwan Ocean University, Taiwan Bairong Shen, Soochow University, China El-Ghazali Talbi, LIFL (CNRS-INRIA-USTL), France Vincent S. Tseng, National Cheng Kung University, Taiwan Lusheng Wang, City University of Hong Kong, China Daming Wei, University of Aizu, Japan Laurence T. Yang, St. Francis Xavier University, Canada Zhiwen Yu, South China University of Technology, China Kaizhong Zhang, Univ. of Western Ont., Canada Daming Zhu, Shandong University, China Shanfeng Zhu, Fudan University, China xlii Steering Committee Hui-Huang Hsu (Chair), Tamkang University, Taiwan Satoru Miyano, University of Tokyo, Japan Tun-Wen Pai, National Taiwan Ocean University, Taiwan Jose C. Principe, University of Florida, USA Oliver Ray, University of Bristol, UK xliii.