Gilberto Vargas-Alarcón
, José-Manuel Fragoso
, David Cruz-Robles
, Angélica Vargas
, Alfonso Vargas
, José-Ignacio Lao-Villadóniga
, Ferrán García-Fructuoso
, Manuel Ramos-Kuri
, Fernando Hernández
, Rashidi Springall
, Rafael Bojalil
, Maite Vallejo
and Manuel Martínez-Lavín 
Arthritis Research & Therapy 2007,
9:R110doi:10.1186/ar2316
See related letter by Martinez and Cassol, http://arthritis-research.com/content/10/6/408, and related response by Eisinger, http://arthritis-research.com/content/10/6/409