TY - JOUR AU - Kristian Helmerson AU - Rani Kishore AU - William Phillips AU - H Weetall C2 - Journal of Clinical Chemistry DA - 1997-01-01 LA - en M1 - 43 PB - Journal of Clinical Chemistry PY - 1997 TI - Optical Tweezers-Based Immunosensor Detects Femtomolar Concentration of Antigens ER -