Cross, G. D., Mandy, Francis, Nicholson, J. K. A., and McDougal, J. S. Guidelines for Performing Single Platform Absolute CD4+ T-Cell Determinations with CD45 Gating in Persons Infected with Human Immunodeficiency Virus (HIV). MMWR.Morbidity and Mortality Weekly Report Vol. 52 RR-2, 1-13. 1-31-2003.
Ref Type: Report
Ref ID: 307

Ridderhof JC, Williams LO, Legios S, et al: Assessment of laboratory performance of nucelic acid amplification tests for decetion of mycobacterium tuberculosis. J.Clin.Microbiol. 2003;41:5258-5261.
Ref ID: 330

Schalla, W. O., Stankovic, Ana, Martin, R., and et al. Guidelines for Laboratory Testing and Result Reporting of Antibody to Hepatitis C Virus. MMWR.Morbidity and Mortality Weekly Report Vol. 52 No. RR-3, 1-15. 2003.
Ref Type: Report
Ref ID: 319

Cross GD, Handsfield JH: Comparison of Absolute CD4 and CD8 T-cell Counts, Multi-platform vs. Single-Platform Methods: Results from a Performance Evaluation Program. International Aids Conference 2 A.D.;(In Press)
Ref ID: 300

Hofherr LK, Francis DP, Astles JR, Schalla WO: HIV-1 Antiretroviral Resistance Testing Laboratories. Clin Lab Sci 2002;15:213-219.
Ref ID: 314

Schalla WO, et al: CDC Guidelines for Reporting HIV Laboratory Test Results. Lab Med 2002;33:2-6.
Ref ID: 311

Schalla, W. O. and et al. Notice to Readers: Approval of a New Rapid Test for HIV Antibody. MMWR.Morbidity and Mortality Weekly Report vol. 51 RR 46, 1-3. 11-22-2002.
Ref Type: Report
Ref ID: 309

Schalla, W. O. and et al. Notice to Readers: Potential Shortage of Supplemental Test Kits for Detecting HIV-1 Antibodies. MMWR.Morbidity and Mortality Weekly Report Vol. 51 RR-18, 395-396. 5-10-2002.
Ref Type: Report
Ref ID: 312

Francis DP, Peddecord KM, Hofherr LK, Astles JR, Schalla WO: Viral Load Test Reports. Arch Pathol Lab Med 2001;125:1546-1554.
Ref ID: 289

Schalla, W. O., Schulte, Joann, and et al. Guidelines for Laboratory Test Result Reporting of Human Immunodeficiency Virus Type 1 Ribonucleic Acid Determination. MMWR.Morbidity and Mortality Weekly Report Vol. 50 RR-20, 1-12. 11-16-2001.
Ref Type: Report
Ref ID: 310

Cross GD, Handsfield JH, Schalla WO: Extreme Values Reported for Cd4 Absolute Cell Counts by Laboratories Using Dual-Platform Methods: Results From a Performance Evaluation Program. Cytometry 2000;42:314
Ref ID: 322

Williams LO, Blumer SO, Schalla WO, et al: Laboratory Performance in Human T-Lymphotrophic Virus Types I/II (HTLV) Analysis. Transfusion 2000;40:1514-1521.
Ref ID: 298

Cross GD, Handsfield JH, Schalla WO: CD4 T-Cell Enumeration: Single-Platform Methods May Yield More Reproducible Results Than Multi-Platform Methods. Cytometry 1999;38:327
Ref ID: 321

Francis DP, Peddecord KM, Hofherr LK, Benenson AS, Schalla WO: T-Lymphocyte Immunophenotyping Blind Proficiency Testing: A Model System for CD4+ T-Cells. Clin Lab Sci 1999;12:278-289.
Ref ID: 11

Astles JR, Lipman HB, Schalla WO, et al: Impact of Quality Control on Accuracy in Enzyme Immunoassay Testing from Human Immunodeficiency Virus Type 1 Antibodies. Arch.Pathol.Lab.Med. 1998;122:700-707.
Ref ID: 14

Cross GD, Handsfield JH, Schalla WO: Comparison of Absolute CD4 T-cell Counts, Multi-platform vs. Single-Platform Methods: Results for a Performance Evaluation Program. Cytometry 1998;34:296
Ref ID: 183

Rosner E, Siragusa M, Schalla WO, Cross GD, Cohn RD, Hearn TL: Assessment of the Impact of a CD4+ T-Cell Testing Laboratory Improvement Program. Arch.Pathol.Lab.Med. 1998;122:512-519.
Ref ID: 5

Cruz JR, Schalla WO, Larsen SA: Quality Assessment Activities in Latin America and the Caribbean. MLO 1997;29:40-42.
Ref ID: 55

Nicholson, J. K. A., Hearn, T. L., Cross, G. D., and White, M. D. 1997 Revised Guidelines for Performing CD4+ T-Cell Determinations in Persons Infected with Human Immunodeficiency Virus (HIV). MMWR.Morbidity and Mortality Weekly Report 46(RR-2), 1-29. 1-10-1997.
Ref Type: Report
Ref ID: 73

Schalla, W. O. Performance Evaluation Programs for Determining HIV-1 Viral Loads, Testing for HIV p24 Antigen, and Identifying Mycobacterium tuberculosis Using Nucleic Acid Amplification Tests. MMWR.Morbidity and Mortality Weekly Report 46(07), 155-156. 2-21-1997.
Ref Type: Report
Ref ID: 54

Cross GD, Schalla WO, Taylor CL, Siragusa M, Cohn RD, Gaunt EE: Precision of Absolute CD4 Counts Between Laboratories: Results of a Pilot Study. Cytometry 1996;26:86
Ref ID: 182

Hearn TL: Standards of Laboratory Practice for Human Immunodeficiency Virus (HIV) Testing, in Schochetman G, George JR (eds): Springer-Verlag; 1994:
Ref ID: 84

Performance Evaluation Program for Mycobacterium tuberculosis Drug-Susceptibility Testing Process. MMWR.Morbidity and Mortality Weekly Report 43(1), 17-18. 1-14-1994.
Ref Type: Report
Ref ID: 100

Hancock JS, Taylor RN, Johnson CA, Gerber AR, Schalla WO: Quality of Laboratory Performance in Testing for Human Immunodeficiency Virus Type 1 Antibody. Identification of Variables Associated with Laboratory Performance. Arch.Pathol.Lab.Med. 1993;117:1148-1155.
Ref ID: 86

Peddecord KM, Benenson AS, Hofherr LK, et al: Variability of Reporting and Lack of Adherence to Consensus Guidelines in Human T-lymphocyte Immunophenotyping Reports: Results of a Case Series. J.Acquir.Immune.Defic.Syndr. 1993;6:823-830.
Ref ID: 109

Peddecord KM, Hofherr LK, Benenson AS, et al: Sources of Influence in Changing Policies and Procedures for HIV-1 Testing. Clin Lab Sci 1993;6:359-365.
Ref ID: 194

D.J. Hewitt, K.M. Peddecord, D.P. Francis, A.S. Benenson, L.K. Hofherr, K.L. Ferran, R.S. Garfein, and A.R. Gerber. Content and Design of Laboratory Report Forms For Human Immunodeficiency Virus Type 1 Antibody Testing. Amer. J. Clin. Path. 1992, Aug. 98:199-204.

Blumer SO, Hearn TL, Schalla WO, Cross GD, Valdiserri RO: Human T-lymphotropic Virus Type I/II. Status of Enzyme Immunoassay and Western Blot Testing in the United States in 1989 and 1990. Arch.Pathol.Lab.Med. 1992;116:471-476.

Cross GD, Schalla WO, Hancock JS, et al: Analytic Sensitivity and Specificity of Enzyme Immunoassay Results in Testing for Human Immunodeficiency Virus Type 1 Antibody. Arch.Pathol.Lab.Med. 1992;116:477-481.
Ref ID: 88

Francis DP, Peddecord KM, Ferran KL, et al: Use of a Modified Nominal Group Process for Improving Laboratory Performance in Human Immunodeficiency Virus Type 1 Antibody Testing. Reaching Consensus on Three Questions Concerning HIV-1 Testing. Clinical Laboratory Management Review 1992;6:537-538-543-546.
Ref ID: 110

Hofherr LK, Peddecord KM, Benenson AS, et al: Methods for a Model Blind Proficiency Testing System. Clin Lab Sci 1992;5:160-164.
Ref ID: 213

Peddecord KM, Benenson AS, Hofherr LK, et al: Analytic Results of HIV-1 Testing Using Blind Proficiency Testing. Clin Lab Sci 1992;5:165-171.
Ref ID: 114

Peddecord KM, Benenson AS, Hofherr LK, et al: Identification of Nonanalytic Issues in HIV-1 Antibody Testing Using Blind Proficiency Testing. Clin Lab Sci 1992;5:172-176.
Ref ID: 113

Schalla, W. O. and et al. Availability of Flow Cytometric Immunophenotyping of Lymphocytes to Hospital Patients -- United States, 1990. MMWR.Morbidity and Mortality Weekly Report 41(33), 608-610. 8-21-1992. Atlanta, GA, Centers for Disease Control.
Ref Type: Report
Ref ID: 196

Schalla, W. O., Blumer, S. O., and Hearn, T. L. Update: Serologic Testing for Human T-Lymphotropic Virus Type I -- United States, 1989 and 1990. MMWR.Morbidity and Mortality Weekly Report 41(15), 259-262. 4-17-1992.
Ref Type: Report
Ref ID: 97

Taylor RN: From the CDC: The Laboratory Performance Information and Exchange System. MLO 1992;
Ref ID: 202

A.R. Gerber, G.D. Cross, W.O. Schalla, J.S. Hancock, H.W. Muir, T.L. Hearn, and R.O. Valdiserri. Evaluation of Laboratory Performance of T-Lymphocyte Immunophenotyping In Support of Early HIV-1 Intervention and Prevention. Publication of Abstracts, VII International Conference on AIDS, Florence, Italy, June 16-21, 1991.

Blumer, S. O., Schalla, W. O., and Cross, G. D. Interpretive Criteria Used to Report Western Blot Results for HIV-1-Antibody Testing -- United States. MMWR.Morbidity and Mortality Weekly Report 40(40), 692-695. 10-11-1991.
Ref Type: Report
Ref ID: 87

G.D. Cross, W.O. Schalla, S.O. Blumer, T.L. Hearn, and R.O. Valdiserri. Enzyme Immunoassay (EIA) Results. American Society for Microbiology May 1991; Dallas, Texas.

Gerber AR, Valdiserri RO, Johnson CA, Schwartz RE, Hancock JS, Hearn TL: Quality of Laboratory Performance in Testing for Human Immunodeficiency Virus Type 1 Antibody. Variables Associated in Multivariate Analyses. Arch.Pathol.Lab.Med. 1991;115:1091-1096.
Ref ID: 89

R.N. Taylor, G.D. Cross, S.O. Blumer, A.R. Gerber, W.O. Schalla, and T.L. Hearn. Analytic Specificities and Sensitivities of Indirect Immunofluorescence Results In Testing for Human Immunodeficiency Virus Type 1 (HIV-1) Antibody From 1988 to 1990. Publication of Abstracts, VII International Conference on AIDS, Florence, Italy, June 16-21, 1991.

S.O. Blumer, W.O. Schalla, G.D. Cross, J.S. Hancock, H.W. Muir, and T.L. Hearn. Analysis of Indeterminate Human T-lymphotropic Virus Type I (HTLV-I) Western Blot Interpretations Reported for HTLV-Type II Infected Individuals. Publication of Abstracts, VII International Conference on AIDS, Florence, Italy, June 16-21, 1991.

T.L. Hearn, R.O. Valdiserri, C.A. Johnson, J.S. Hancock, R.E. Schwartz, and A.R. Gerber. Correlation Between Laboratory Personnel Parameters and The Quality of HIV-1 Antibody Testing In U.S. Laboratories. Publication of Abstracts, VII International Conference on AIDS, Florence, Italy, June 16-21, 1991.

Taylor RN: Information About AIDS. Ann.Intern.Med. 1991;115:160
Ref ID: 201

Valdiserri RO, Cross GD, Gerber AR, Schwartz RE, Hearn TL: Capacity of U.S. Labs to Provide TLI in Support of Early HIV-1 Intervention. Am.J.Public Health 1991;81:491-494.
Ref ID: 90

W.O. Schalla, G.D. Cross, S.O. Blumer, J.S. Hancock, A.R. Gerber, H.W. Muir, and T.L. Hearn. Update On Western Blot Testing: Performance Evaluation of Laboratories That Test For Human Immunodeficiency Virus Type 1 (HIV-1) Antibodies. Publication of Abstracts, VII International Conference on AIDS, Florence, Italy, June 16-21, 1991.

A.R. Gerber, C.A. Johnson, R.E. Schwartz, T.L. Hearn, and R.O. Valdiserri. Association of Performance On EIA for HIV-1 Antibody With Laboratory Characteristics And Testing Practices. Publication of Abstracts for the Sixth International AIDS Conference, June 20-24, 1990, San Francisco, California.

Blumer, S. O. and Schalla, W. O. Indeterminate Western Blot Results on Human T-Lymphotropic Virus Type I/II (HTLV)-I/II) Antibody-Positive Samples. 1. 2-26-1990. MPEP Performance Bulletin.
Ref Type: Report
Ref ID: 149

Blumer, S. O., Cross, G. D., and Schalla, W. O. Laboratory Reports and Reporting the Results of Human immunodeficiency Virus Type 1 (HIV-1) Testing. 2. 5-10-1990. MPEP Performance Bulletin.
Ref Type: Report
Ref ID: 150

Gerber, A. R., Schalla, W. O., and Hearn, T. L. Update: Serologic Testing for HIV-1 Antibody --United States, 1988 and 1989. MMWR.Morbidity and Mortality Weekly Report 39(22), 380-383. 6-8-1990.
Ref Type: Report
Ref ID: 96

MPEP Performance Bulletin No. 1. Indeterminate Western Blot Results On Human T-Lymphotropic Virus Type I/II (HTLV-I/II) Antibody-Positive Samples. Feb. 26, 1990. CDC Model Performance Evaluation Program. (Prepared by S.O. Blumer and W.O. Schalla.)

MPEP Performance Bulletin No. 2. Laboratory Reports and Reporting the Results of Human Immunodeficiency Virus Type 1 (HIV-1) Testing. May 10, 1990. CDC Model Performance Evaluation Program. (Prepared by S.O Blumer, G.D. Cross, and W.O. Schalla.)

S.O. Blumer, T.L. Hearn, W.O. Schalla, G.D. Cross, and R.O. Valdiserri. Assessment Of Human T-Cell Lymphotrophic Virus Type I/II Antibody Testing. 1990. Publication of Abstracts for the Sixth International AIDS Conference, June 20-24, 1990, San Francisco, California.

Schalla WO, Hearn TL, Taylor RN, Eavenson E, Valdiserri RO, Essien J: CDC's Model Performance Evaluation Program: Assessment of the Quality of Laboratory Performance for HIV-1 Antibody Testing. Public Health Rep. 1990;105:167-171.
Ref ID: 94

Taylor RN, Hearn TL, Schalla WO, Valdiserri RO: Indirect Immunofluorescence Test Performance and Questionnaire Results from the Centers for Disease Control Model Performance Evaluation Program for Human Immunodeficiency Virus Type 1 Testing. J.Clin.Microbiol. 1990;28:1799-1807.
Ref ID: 92

Valdiserri RO, Taylor RN, Hearn TL, Schalla WO, Muir HW: Centers for Disease Control Perspective on Quality Assurance for Human Immunodeficiency Virus Type 1 Antibody Testing. Model Performance Evaluation Program. Arch.Pathol.Lab.Med. 1990;114:263-267.
Ref ID: 95

W.O. Schalla, G.D. Cross, T.L. Hearn, S.O. Blumer, R.N. Taylor, and R.O. Valdiserri. Accuracy of Western Blot Testing For Human Immunodeficiency Virus Type 1 (HIV-1) Infection. Publication of Abstracts for the 1990 American Society for Microbiology Annual Meeting, May 13-17, 1990, Anaheim, California.

W.O. Schalla, T.L. Hearn, G.D. Cross, S.O. Blumer, R.N. Taylor, and R.O. Valdiserri. Human Immunodeficiency Virus Type-1 (HIV-1) Antibody Testing: Accuracy of Western Blot Results. Publication of Abstracts for the Sixth International AIDS Conference, June 20-24, 1990, San Francisco, California.

W.O. Schalla, T.L. Hearn, R.N. Taylor, E. Eavenson, R.O. Valdiserri. The Centers For Disease Control's Model Performance Evaluation Program: Assessment Of The Quality of Laboratory Testing For Human Immunodeficiency Virus Type 1 (HIV-1) Infection. Collaborative article with Family of SeroSurveys. 1990. Public Health Reports 105(2):167-71.

Benenson AS, Peddecord KM, Hofherr LK, Ascher MS, Taylor RN, Hearn TL: Reporting the Results of Human Immunodeficiency Virus Testing. JAMA 1989;262:3435-3438.
Ref ID: 91

Hearn, T. L., Schalla, W. O., and Taylor, R. N. Performance Evaluation for Human T-Lymphotropic Virus Type 1 Antibody Testing Being Implemented by CDC. ASTPHLD Newsletter . 1989.
Ref Type: Newsletter Article
Ref ID: 122

Hearn, T. L., Schalla, W. O., and Taylor, R. N. Results from CDC's Model Performance Evaluation Program Presented at the Fifth International Conference on AIDS. ASTPHLD Newsletter . 1989.
Ref Type: Newsletter Article
Ref ID: 123

Schalla, W. O. and Hearn, T. L. Interpretation and Use of the Western Blot Assay for Serodiagnosis of Human Immunodeficiency Virus Type 1 Infections. MMWR.Morbidity and Mortality Weekly Report 38(S-7), 1-7. 7-21-1989.
Ref Type: Report
Ref ID: 106

Schalla, W. O., Hearn, T. L., Valdiserri, R. O., Blumer, S. O., and Taylor, R. N. Current Trends Problems Created by Heat-Inactivation of Serum Specimens Before HIV-1 Antibody Testing. MMWR.Morbidity and Mortality Weekly Report 38(23), 407-408, 413. 6-16-1989. Atlanta, GA, Centers for Disease Control.
Ref Type: Report
Ref ID: 195

Anonymous Serological Diagnosis of Human Immunodeficiency Virus Infection by Western Blot Testing. The Consortium for Retrovirus Serology Standardization. JAMA 1988;260:674-679.
Ref ID: 121

Griffin CW: Model Performance Evaluation Program (HIV testing): Program Overview. Infect.Control Hosp.Epidemiol. 1988;9:364
Ref ID: 108

Griffin, C. W., Hearn, T. L., and Taylor, R. N. Current Trends Update: Serologic Testing for Antibody to Human Immunodeficiency Virus . MMWR.Morbidity and Mortality Weekly Report 36(52), 833-845. 1-8-1988.
Ref Type: Report
Ref ID: 107

Griffin, C. W., Hearn, T. L., Schalla, W. O., and Taylor, R. N. Serologic Testing for Antibody to Human Immunodeficiency Virus. MMWR.Morbidity and Mortality Weekly Report Vol. 36(No. 52), 833-845. 1-8-1988.
Ref Type: Report
Ref ID: 214

Schalla, W. O., Hearn, T. L., Griffin, C. W., and Taylor, R. N. Role of the Centers for Disease Control in Monitoring the Quality of Laboratory Testing for Human Immunodeficiency Virus Infection. Clinical Microbiology Newsletter 10(20), 156-159. 10-15-1988.
Ref Type: Newsletter Article
Ref ID: 192

Taylor RN, et al: Serological Diagnosis of Human Immunodeficiency Virus Infection by Western Blot testing. JAMA 1988;260:674-679.
Ref ID: 199

Taylor RN, Przybyszewski VA: Sindrome da immunodeficienza acquisita. Valutazione della efficienza die laboratori nella ricerca degli anticorpi HIV. Sommario dei rilevarmenti esguiti dai Centri per il controllo della malattia. American Journal of Clinical Pathology (Italian edition) 1988;9-22.
Ref ID: 126

Taylor RN, Przybyszewski VA: Summary of the Centers for Disease Control Human Immunodeficiency Virus (HIV) Performance Evaluation Surveys for 1985 and 1986. Am.J.Clin.Pathol. 1988;89:1-13.
Ref ID: 125

Schalla WO, Harrison HR': Western Blot Analysis of the Human Serum Response to Mycoplasma hominis. Isr.J.Med.Sci. 1987;23:613-617.
Ref ID: 119

Schalla, W. O., Hearn, T. L., Griffin, C. W., and Taylor, R. N. Performance Evaluation Program: Testing for Human Immunodeficiency Virus Infection. MMWR.Morbidity and Mortality Weekly Report 26(26), 614. 9-18-1987. Atlanta, GA, Centers for Disease Control.
Ref Type: Report
Ref ID: 197

Przybyszewski, V. A. and Taylor, R. N. Allergen-Specific Immunoglobulin E Performance Evaluation Results. 1983. Atlanta, GA, CDC, PHS, HHS.
Ref Type: Serial (Book,Monograph)
Ref ID: 210

Taylor RN, Fulford KM: Assessment of Laboratory Improvement by the Centers for Disease Control Diagnostic Immunology Proficiency Testing Program. J.Clin.Microbiol. 1981;13:356-368.
Ref ID: 220

Taylor, R. N. and Fulford, K. M. Laboratory Improvement in the CDC Proficiency Testing Program. Clinical Immunology Newsletter 2, 15-19. 1981.
Ref Type: Newsletter Article
Ref ID: 221

Taylor RN, Fulford KM, Przybyszewski VA, Pope V: Center for Disease Control Diagnostic Immunology Proficiency Testing Program Results for 1978. J.Clin.Microbiol. 1979;10:805-814.
Ref ID: 128

Taylor RN, Fulford KM, Przybyszewski VA, Pope V: Center for Disease Control Diagnostic Immunology Proficiency Testing Program Results for 1977. J.Clin.Microbiol. 1978;8:388-395.
Ref ID: 129

Taylor RN, Fulford KM, Przybyszewski VA, Pope V: Center for Disease Control Diagnostic Immunology Proficiency Testing Program Results for 1976. J.Clin.Microbiol. 1977;6:224-232.
Ref ID: 198

Cross GD, Schalla WO, Taylor RN, Siragusa M, Cohn RD, Gaunt EE: Effect of Specimen Age, Storage Temperature, and Shipping Conditions on Hematology and Flow Cytometric Determinations of Absolute CD4+ T-Cells Counts, (UnPub)
Ref ID: 30