... participated in study design, and coordinated acquisition of clinical data and laboratory samples, as well as entry of clin-ical and laboratory variables into the database. All authors par-ticipated ... statistical analyses. TM and JOC coordinated the acquisition of laboratory samples,clinical data acquisition, and entry of clinical and laboratoryvariables into the database. TJH, CMTG, and GSC partici-pated ... measured IgG ANAs,using HEp-2 cells as a substrate. The frequency of ANA posi-tive status at the time of study in our lupus patients was85.2%, as compared with a rate of 4% ANA positivity...