[1] Merck & Company,Department of Rheumatology
[2] Inc.,Facultad de Medicina de Leon
[3] Temple University School of Pharmacy,Department of Medicine
[4] C. Argerich Hospital,Department of Rheumatology
[5] Hospital Aranda de la Parra,Department of Internal Medicine
[6] Universidad de Carabobo,Department of Medicine, Division of Rheumatology
[7] Hospital Central de la Fuerza Aérea,undefined
[8] State University (Unicamp),undefined
[9] Universida de Federal de Sao Paulo,undefined
[10] Hospital Dr. R.A. Calderón Guardia,undefined
[11] Rutgers University,undefined
[12] Merck Research Laboratoires,undefined