1. Center for Bioelectronics, Biosensors and Biochips (C3B), Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
2. Faculty of Chemistry, Department of Chemical Engineering, Wroclaw University of Science and Technology, Wroclaw 50-370, Poland
3. ABTECH Scientific, Inc., Biotechnology Research Park, 800 East Leigh Street, Richmond, Virginia 23219, United States