1. Department of Engineering Science, National Cheng Kung University, Tainan 701, Taiwan
2. Department of Medical Information, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan
3. Department of Information Management, Tunghai University, Taichung 407, Taiwan
4. TechKnowledge Services Group Inc., Taipei 104, Taiwan
5. Department of Medical Informatics, National Cheng Kung University Hospital, Tainan 701, Taiwan