Validation of an algorithm for identifying MS cases in administrative health claims datasets

Culpepper WJ, Marrie RA, Langer-Gould A, Wallin MT, Campbell JD, Nelson LM, Kaye WE, Wagner L, Tremlett H, Chen LH, Leung S, Evans C, Yao S, LaRocca NG; United States Multiple Sclerosis Prevalence Workgroup (MSPWG).