Editorials:

Daniel I. Chasman and Guillaume Paré

Getting Closer to P-Selectin
Clin Chem 2009 55: 1051-1052. Published online April 16, 2009; 10.1373/clinchem.2009.125518 [Extract] [Full Text] [PDF]  

Larry J. Kricka and Stephen R. Master

Quality Control and Protein Microarrays
Clin Chem 2009 55: 1053-1055. Published online April 24, 2009; 10.1373/clinchem.2009.126557 [Extract] [Full Text] [PDF]  

Pablo Avanzas, Ramón Arroyo-Espliguero, and Juan Carlos Kaski

Neopterin and Cardiovascular Disease: Growing Evidence for a Role in Patient Risk Stratification
Clin Chem 2009 55: 1056-1057. Published online April 24, 2009; 10.1373/clinchem.2009.127084 [Extract] [Full Text] [PDF]  

Perspective:

Larry J. Kricka and Jason Y. Park

Magnetism and Magnetoresistance: Attractive Prospects for Point-of-Care Testing?
Clin Chem 2009 55: 1058-1060. Published online April 16, 2009; 10.1373/clinchem.2009.123927 [Extract] [Full Text] [PDF]  

Mini-Review:

Steven J. Soldin and Offie P. Soldin

Steroid Hormone Analysis by Tandem Mass Spectrometry
Clin Chem 2009 55: 1061-1066. Published online March 26, 2009; 10.1373/clinchem.2007.100008 [Abstract] [Full Text] [PDF]  

Review:

Hubert W. Vesper and Linda M. Thienpont

Traceability in Laboratory Medicine
Clin Chem 2009 55: 1067-1075. Published online April 9, 2009; 10.1373/clinchem.2008.107052 [Abstract] [Full Text] [PDF]  

Molecular Diagnostics and Genetics:

Kelly A. Volcik, Diane Catellier, Aaron R. Folsom, Nena Matijevic, Bruce Wasserman, and Eric Boerwinkle

SELP and SELPLG Genetic Variation Is Associated with Cell Surface Measures of SELP and SELPLG: The Atherosclerosis Risk in Communities Carotid MRI Study
Clin Chem 2009 55: 1076-1082. Published online April 24, 2009; 10.1373/clinchem.2008.119487 [Abstract] [Full Text] [PDF]  

Julia K. Bickmann, Wolfgang Kamin, Matthias Wiebel, Friederike Häuser, Jürgen J. Wenzel, Carolin Neukirch, Manfred Stuhrmann, Karl J. Lackner, and Heidi Rossmann

A Novel Approach to CFTR Mutation Testing by Pyrosequencing-Based Assay Panels Adapted to Ethnicities
Clin Chem 2009 55: 1083-1091. Published online April 16, 2009; 10.1373/clinchem.2008.120220 [Abstract] [Full Text] [PDF] Supplemental Data  

Proteomics and Protein Markers:

Allison A. Ellington, Iftikhar J. Kullo, Kent R. Bailey, and George G. Klee

Measurement and Quality Control Issues in Multiplex Protein Assays: A Case Study
Clin Chem 2009 55: 1092-1099. Published online April 16, 2009; 10.1373/clinchem.2008.120717 [Abstract] [Full Text] [PDF] Supplemental Data  

Jesse C. Seegmiller, David R. Barnidge, Bradley E. Burns, Timothy S. Larson, John C. Lieske, and Rajiv Kumar

Quantification of Urinary Albumin by Using Protein Cleavage and LC-MS/MS
Clin Chem 2009 55: 1100-1107. Published online March 26, 2009; 10.1373/clinchem.2008.115543 [Abstract] [Full Text] [PDF] Supplemental Data  

Eric Kuhn, Terri Addona, Hasmik Keshishian, Michael Burgess, D.R. Mani, Richard T. Lee, Marc S. Sabatine, Robert E. Gerszten, and Steven A. Carr

Developing Multiplexed Assays for Troponin I and Interleukin-33 in Plasma by Peptide Immunoaffinity Enrichment and Targeted Mass Spectrometry
Clin Chem 2009 55: 1108-1117. Published online April 16, 2009; 10.1373/clinchem.2009.123935 [Abstract] [Full Text] [PDF] Supplemental Data  

Fons Windhausen, Alexander Hirsch, Johan Fischer, P. Marc van der Zee, Gerard T. Sanders, Jan P. van Straalen, Jan Hein Cornel, Jan G.P. Tijssen, Freek W.A. Verheugt, Robbert J. de Winter for the Invasive versus Conservative Treatment in Unstable Coronary Syndromes (ICTUS) Investigators

Cystatin C for Enhancement of Risk Stratification in Non–ST Elevation Acute Coronary Syndrome Patients with an Increased Troponin T
Clin Chem 2009 55: 1118-1125. Published online April 9, 2009; 10.1373/clinchem.2008.119669 [Abstract] [Full Text] [PDF] Supplemental Data  

Suetonia C. Palmer, Zoltan H. Endre, A. Mark Richards, and Timothy G. Yandle

Characterization of NT-proBNP in Human Urine
Clin Chem 2009 55: 1126-1134. Published online April 9, 2009; 10.1373/clinchem.2008.121673 [Abstract] [Full Text] [PDF]  

Lipids, Lipoproteins, and Cardiovascular Risk Factors:

Tanja B. Grammer, Dietmar Fuchs, Bernhard O. Boehm, Bernhard R. Winkelmann, and Winfried Maerz

Neopterin as a Predictor of Total and Cardiovascular Mortality in Individuals Undergoing Angiography in the Ludwigshafen Risk and Cardiovascular Health Study
Clin Chem 2009 55: 1135-1146. Published online April 24, 2009; 10.1373/clinchem.2008.118844 [Abstract] [Full Text] [PDF] Supplemental Data  

Automation and Analytical Techniques:

Rita Hannisdal, Per Magne Ueland, and Asbjørn Svardal

Liquid Chromatography–Tandem Mass Spectrometry Analysis of Folate and Folate Catabolites in Human Serum
Clin Chem 2009 55: 1147-1154. Published online April 9, 2009; 10.1373/clinchem.2008.114389 [Abstract] [Full Text] [PDF] Supplemental Data  

Endocrinology and Metabolism:

Paul J. Taylor, Donald P. Cooper, Richard D. Gordon, and Michael Stowasser

Measurement of Aldosterone in Human Plasma by Semiautomated HPLC–Tandem Mass Spectrometry
Clin Chem 2009 55: 1155-1162. Published online April 9, 2009; 10.1373/clinchem.2008.116004 [Abstract] [Full Text] [PDF] Supplemental Data  

Armin Zittermann, Stefanie S. Schleithoff, Sabine Frisch, Christian Götting, Joachim Kuhn, Heinrich Koertke, Knut Kleesiek, Gero Tenderich, and Reiner Koerfer

Circulating Calcitriol Concentrations and Total Mortality
Clin Chem 2009 55: 1163-1170. Published online April 9, 2009; 10.1373/clinchem.2008.120006 [Abstract] [Full Text] [PDF]  

Hemostasis and Thrombosis:

Boris T. Ivandic, Mareike Sausemuth, Hesham Ibrahim, Evangelos Giannitsis, Meinrad Gawaz, and Hugo A. Katus

Dual Antiplatelet Drug Resistance Is a Risk Factor for Cardiovascular Events after Percutaneous Coronary Intervention
Clin Chem 2009 55: 1171-1176. Published online April 9, 2009; 10.1373/clinchem.2008.115089 [Abstract] [Full Text] [PDF]  

Drug Monitoring and Toxicology:

Sherri L. Kacinko, Hendree E. Jones, Rolley E. Johnson, Robin E. Choo, Marta Concheiro-Guisan, and Marilyn A. Huestis

Urinary Excretion of Buprenorphine, Norbuprenorphine, Buprenorphine-Glucuronide, and Norbuprenorphine-Glucuronide in Pregnant Women Receiving Buprenorphine Maintenance Treatment
Clin Chem 2009 55: 1177-1187. Published online March 26, 2009; 10.1373/clinchem.2008.113712 [Abstract] [Full Text] [PDF] Supplemental Data  

Eugene W. Schwilke, Erin L. Karschner, Ross H. Lowe, Ann M. Gordon, Jean Lud Cadet, Ronald I. Herning, and Marilyn A. Huestis

Intra- and Intersubject Whole Blood/Plasma Cannabinoid Ratios Determined by 2-Dimensional, Electron Impact GC-MS with Cryofocusing
Clin Chem 2009 55: 1188-1195. Published online March 5, 2009; 10.1373/clinchem.2008.114405 [Abstract] [Full Text] [PDF] Supplemental Data  

Thomas M. Annesley and Larry T. Clayton

Ultraperformance Liquid Chromatography–Tandem Mass Spectrometry Assay for Iohexol in Human Serum
Clin Chem 2009 55: 1196-1202. Published online April 9, 2009; 10.1373/clinchem.2008.121533 [Abstract] [Full Text] [PDF] Supplemental Data  

Matthew D. Krasowski, Mohamed G. Siam, Manisha Iyer, Anthony F. Pizon, Spiros Giannoutsos, and Sean Ekins

Chemoinformatic Methods for Predicting Interference in Drug of Abuse/Toxicology Immunoassays
Clin Chem 2009 55: 1203-1213. Published online April 2, 2009; 10.1373/clinchem.2008.118638 [Abstract] [Full Text] [PDF] Supplemental Data  

Brief Communications:

Risto Tertti, Saara Wittfooth, Pekka Porela, K.E. Airaksinen, Kaj Metsärinne, and Kim Pettersson

Intravenous Administration of Low Molecular Weight and Unfractionated Heparin Elicits a Rapid Increase in Serum Pregnancy-Associated Plasma Protein A
Clin Chem 2009 55: 1214-1217. Published online March 26, 2009; 10.1373/clinchem.2008.108738 [Abstract] [Full Text] [PDF]  

Max Scherer, Gerd Schmitz, and Gerhard Liebisch

High-Throughput Analysis of Sphingosine 1-Phosphate, Sphinganine 1-Phosphate, and Lysophosphatidic Acid in Plasma Samples by Liquid Chromatography–Tandem Mass Spectrometry
Clin Chem 2009 55: 1218-1222. Published online March 26, 2009; 10.1373/clinchem.2008.113779 [Abstract] [Full Text] [PDF] Supplemental Data  

Mitsuharu Ueda, Yohei Misumi, Mineyuki Mizuguchi, Masaaki Nakamura, Taro Yamashita, Yoshiki Sekijima, Kazutoshi Ota, Satoru Shinriki, Hirofumi Jono, Shu-ichi Ikeda, Ole B. Suhr, and Yukio Ando

SELDI-TOF Mass Spectrometry Evaluation of Variant Transthyretins for Diagnosis and Pathogenesis of Familial Amyloidotic Polyneuropathy
Clin Chem 2009 55: 1223-1227. Published online April 16, 2009; 10.1373/clinchem.2008.118505 [Abstract] [Full Text] [PDF] Supplemental Data  

Clinical Case Study:

Elizabeth K. O'Keeffe, Melissa M. Rhodes, and Alison Woodworth

A Patient with a Previous Diagnosis of Hemoglobin S/C Disease with an Unusually Severe Disease Course
Clin Chem 2009 55: 1228-1231. [Extract] [Full Text] [PDF]  

Carlo Brugnara

Commentary
Clin Chem 2009 55: 1231-1232. [Extract] [Full Text] [PDF]  

James Hoyer

Commentary
Clin Chem 2009 55: 1232-1233. [Extract] [Full Text] [PDF]  

Citation Classic:

Jack D. Henion

The Origins of Ion Spray Liquid Chromatography–Tandem Mass Spectrometry
Clin Chem 2009 55: 1234-1235. Published online April 9, 2009; 10.1373/clinchem.2009.126193 [Extract] [Full Text] [PDF]  

Q&A:

Thomas Annesley

Mass Spectrometry in the Clinical Laboratory: How Have We Done, and Where Do We Need to Be?
Clin Chem 2009 55: 1236-1239. Published online April 24, 2009; 10.1373/clinchem.2009.127522 [Extract] [Full Text] [PDF]  

Letters to the Editor:

Harm de Waard and Peter van 't Sant

Use of Serum Myoglobin Assays for Urine Myoglobin Measurements Can Cause False-Negative Results
Clin Chem 2009 55: 1240-1241. Published online April 2, 2009; 10.1373/clinchem.2008.118968 [Extract] [Full Text] [PDF]  

Liesbeth L. Vynckier, Katelijne M.J. Floré, Sigurd E. Delanghe, and Joris R. Delanghe

Urinary β-Trace Protein as a New Renal Tubular Marker
Clin Chem 2009 55: 1241-1243. Published online April 9, 2009; 10.1373/clinchem.2008.119727 [Extract] [Full Text] [PDF]  

Charles Turner, Yvonne Daniel, and R. Neil Dalton

Newborn Screening for Sickle Cell Disease through Use of Tandem Mass Spectrometry
Clin Chem 2009 55: 1243-1244. Published online April 2, 2009; 10.1373/clinchem.2008.120964 [Extract] [Full Text] [PDF]  

François Boemer, Olivier Ketelslegers, Jean-Marc Minon, Vincent Bours, and Roland Schoos

In Reply
Clin Chem 2009 55: 1244-1245. Published online April 2, 2009; 10.1373/clinchem.2008.122234 [Extract] [Full Text] [PDF]  

Richard W. Browne, Michael S. Bloom, Enrique F. Schisterman, Jean Wactawski-Wende, Kathy Hovey, Maurizio Trevisan, and Myron Gross

Analytical and Biological Variation of F₂-Isoprostanes during the Menstrual Cycle
Clin Chem 2009 55: 1245-1247. Published online April 9, 2009; 10.1373/clinchem.2008.122101 [Extract] [Full Text] [PDF]  

Catherine Massart and Jean-Claude Souberbielle

Serum 25-Hydroxyvitamin D Immunoassays: Recommendations for Correct Clinical Interpretation
Clin Chem 2009 55: 1247-1248. Published online April 2, 2009; 10.1373/clinchem.2008.122952 [Extract] [Full Text] [PDF]  

Larry J. Kricka, Michael Milone, Stephen R. Master, Leslie M. Shaw, Donald S. Young, Rodellia Fontanilla, Treasa Smith, JoAnn Gardiner, David Cardamone, Marilyn Fleming, and David G. Rhoads

Effect of a Variable Magnetic Field on Clinical Laboratory Testing
Clin Chem 2009 55: 1249-1250. Published online April 2, 2009; 10.1373/clinchem.2009.123679 [Extract] [Full Text] [PDF]  

Kimberly L. Napoli

More on Methanol-Associated Matrix Effects in Electrospray Ionization Mass Spectrometry
Clin Chem 2009 55: 1250-1252. Published online April 16, 2009; 10.1373/clinchem.2009.126508 [Extract] [Full Text] [PDF]  

Clinical Chemist:

Eleftherios P. Diamandis

Unveiling the Right Side: How to Win Wimbledon Championships: Creating Beklof and Vamos
Clin Chem 2009 55: 1253-1254. [Extract] [Full Text] [PDF]  

Marion Lawrence Snyder and Corinne R. Fantz

What Is Your Guess?
Clin Chem 2009 55: 1255. [Extract] [Full Text] [PDF]  

Lily Robinson and Death Outside the Box: Recollections
Clin Chem 2009 55: 1256-1257. [Extract] [Full Text] [PDF]  

Clinical Chemistry ’s NIH Book Club Corner
Clin Chem 2009 55: 1257. [Extract] [Full Text] [PDF]  

Corrections:

M.P. Caulfield, S. Li, G. Lee, P.A. Blanche, W.A. Salameh, W.H. Benner, R.E. Reitz, and R.M. Krauss

In Reply
Clin Chem 2009 55: 1258. [Extract] [Full Text] [PDF]  

E. Sunami, M. Shinozaki, C.S. Higano, R. Wollman, T.B. Dorff, S.J. Tucker, S.R. Martinez, R. Mizuno, F.R. Singer, and D.S.B. Hoon

A Multimarker Circulating DNA Assay for Assessing Prostate Cancer Patients’ Blood
Clin Chem 2009 55: 1258. Published online April 24, 2009; 10.1373/clinchem.2009.108498 [Extract] [Full Text] [PDF]  

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