TY - JOUR AU - Michael Welch AU - Mary Satterfield C2 - Clinical Biochemistry DA - 2005-11-01 LA - en M1 - 38 PB - Clinical Biochemistry PY - 2005 TI - Comparison by LC-MS and MALDI-MS of Prostate-Specific Antigen From Five Commercial Sources with Certified Reference Material 613 ER -